THIAZOLE OR IMIDAZOLE DERIVATIVES AS MAILLARD REACTION INHIBITORS

Abstract: A compound represented by formula (I) is disclosed, wherein the all symbols are defined in the disclosure. A process for producing the compound, and a method for treating diseases caused by a Maillard reaction in living body using the compound are also disclosed.

Description: THIAZOLE OR IMIDAZOLE DERIVATIVES AS MAILLARD REACTION INHIBITORS Technical Field The present invention relates to a novel Maillard reaction inhibitor. Background Art The Maillard reaction is a reaction which starts in a living body with an attack by a nucleophilic reaction with a free amino group present in a protein on an aldehyde group of a reducing sugar such as glucose to from a Schiff base which is called aldimine. Then, aldimine successively cause a rearrangement to form a more stable Amadori compound (non- enzymatic glycation) . The Amadori compound further causes a series of reaction with other proteinous amino groups, thereby to form a brown fluorescent material and to cause a crosslinking between proteins. Historically, Maillard reported in 1912 that a mixed solution of an amino acid and a reducing sugar, when heated, is colored into brown (L. C. Maillard, Compt. Rend. Soc. Biol. , 72, 599 (1912)) and, since then, the reaction is called Maillard reaction. At that time, Maillard already suggested that the reaction could occur in a living body. In 1968, Rabber et al found that hemoglobin A Jc which is a very small fraction of hemoglobin is increased in the blood of diabetic patients (S. Rabber et al, Clin. Chim. Acta. , 22, 296 (1968)) and further, it was found that the hemoglobin A lc was formed by bonding glucose to the N terminal valine of the hemoglobin β-chain in the form of an Amadori rearrangement (V. J. Stevens, H. Vlassara, A. Abati, & A. Cerami, J. Biol. Chem., 252, 2998 (1977)), etc., and the occurrence of a non-enzymatic glycation in a living body was proved. Recently, it has been confirmed that various bioproteins may undergo the Maillard reaction. For example, it is reported that the amount of hemoglobin subjected to a glycation is increased thrice in a diabetic (E. C. Abraham et al, J. Lab. Clin. Med. , 102, 187 (1983)). Also, it is reported that the amount of glycation is increased in the serum albumin of diabetic patients (R. Dolhofer and 0. H. Wieland, Diabetes, 29, 417 (1980)). Also, it is reported that fluorescence is increased in the skin collagen obtained from diabetic patients (Vincent M. Monnier et al, Proc. Natl. Acad. Sci. U.S.A., 81, 583 (1984)). The non-enzymatic glycation is a phenomenon observed in a healthy person, but the accumulation of the brown fluorescent material is a protein having a delayed metabolic turnover rate and is markedly observed in aging and a diabetic state of increasing a blood sugar value. The reason therefor has been reported by Patrick et al that an accumulated amount of the Maillard reaction product is determined by a blood sugar value, the metabolic turnover rate of the target protein thereof, etc. (J. S. Patrick, S. R. Thorpe and J. W. Baynes, Journal of Gerontology, 45, 1, B18-23 (1990)). The correlation between such a Maillard reaction product and various cause of diseases relating to diabetes 5 and aging has been discussed. For example, it is reported that, when a serum protein which has been subjected to glycation is intravenously administrated to mice for 12 weeks, a typical renal disorder in diabetes is caused (B. A. McVerry et al, The Lancet, 5., 738 (1980)). It is also 10 considered that the non-enzymatic glycation of a nervous myelin protein takes part in one of the causes of the diabetic nervous disorder (V. M. Monnier et al, Clin. Endocrinol. Metab. , 11, 431 (1982)). An eyeball lens crystalline is a specific protein 15 causing no metabolic turnover after being biosynthesized, and Cerami et al found that, when the crystalline undergoes the glycation, a colorless crosslinked compound having a disulfide linkage and a colored crosslinked compound having a fluorescence are formed (V. M. Monnier & A. Cerami, Science, 20 211, 491 (1981) and V. M. Monnier & A. Cerami, Biochim. Biophys. Acta. , 760, 97 (1983)). When the crystalline undergoes glycation, polymerization, insolubilization, » increase in fluorescence, and coloring in brown occur, closely similar to the changes of the eyeball lens with aging * 25 (S. H. Chiou et al, J. Biol. Chem. , 256, 5176 (1981)). Collagen and elastin which are proteins constituting connective tissues are proteins showing very slow metabolic turnover and a combined product with glucose has been found in a renal glomerulus base membrane, a skin, a tendon, etc. (V. M. Monnier et al, "Maillard Reaction in Food", Prog. Food Nutr. Sci. , 5., 315, Pergamon Press, London). Brownlee et al showed that, in a diabetic rat, crosslinking of collagen increases in the wall of the blood vessel, thereby to accumulate a fluorescent material, and also that such a crosslinking occurs by a non-enzymatic mechanism (M. Brownlee et al, Science, 232, 1629 (1989)). The reaction with hardening of the arterial wall has also been considered (H. Rosenburn et al, Biochem. Biophys., Res. Commun. , 91, 498 (1979)). As described above, it is considered that the Maillard reaction in a living body takes part in various diseases relating to diabetes and aging. In these points of view, many studies have been made on the treatment of diseases relating to diabetes and aging. For example, EP-A-0 316 852 and EP-A-0 222 313 disclose compositions for inhibiting the advanced glycosylation of a target protein, and JP-A-64-56614 (the term "JP-A" as used herein means "unexa ined published Japanese Patent Application") and EP-A-0 531 812 disclose a Maillard reaction inhibitor. On the other hand, various compounds containing a thiazolidine, thiazoline or thiazole residue have been reported. For example, JP-B-30-3225 (the term "JP-B" as used herein means "examined Japanese Patent Publication"), JP-B- 5 30-8940, JP-B-4l-l1255 and JP-B-41-1256 disclose compounds containing a thiazolidine, thiazoline or thiazole residue as an antibacterial agent; JP-B-46-15936 discloses a compound containing a thiazolidine residue as an antiviral agent; JP- A-4-66579 and WO 92/18501 disclose compounds containing a 10 thiazolidine residue as an agent having hypolipidemic and/or hypoglycemic activities; EP-A-0 476 455 discloses a compound containing a thiazole residue as a compound useful in the determination of reducing substances such as nicotinamide adenine dinucleotide; and Can. J. Chem. 31_, 1597-1607 (1978), 15 J. Heterocyclic Chem., JL5_, 401 (1978) and Z. Chem., 8(9), 339-40 reports about synthesis of compounds containing a thiazolidine, thiazoline or thiazole residue. Disclosure of Invention An object of the present invention is to provide a 20 novel Maillard reaction inhibitor. According to the present invention, there is provided a Maillard reaction inhibitor comprising, as an active ingredient, at least one compound selected from those represented by the general formula (1) : _. 25 wherein: R 1 represents a hydrogen atom, a lower alkoxycarbonyl-lower alkyl group, a phenyl-lower alkyl group which may have from 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkyl hio group on the phenyl ring thereof, or a phenyl group which may have 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group; R 2 represents an amino group, a phenylsulfonylamino group which may have a substituent selected from a halogen atom, a hydroxyl group, an amino group and a lower alkanoylamino group on the phenyl ring thereof, or —N=R (wherein R represents a lower alkylidene group, a lower alkylidene group having 1 or 2 lower cycloalkyl groups, a lower cycloalkylidene group, a diphenyl-lower alkylidene group or a phenyl-lower alkylidene group); R 3 represents: a hydrogen atom, a lower alkyl group, a lower alkenyl group, a phenyl-lower alkoxy-lower alkyl group, a phenyl group which may have a hydroxyl group, a 5-membered or 6-membered unsaturated heterocyclic-lower alkyl group having 1 or 2 hetero atoms selected from a nitrogen atom and a sulfur atom (the heterocyclic ring may be condensed with a benzene ring and a hydroxyl group may be located as a substituent on either one or both of the heterocyclic ring and the benzene ring being condensed therewith) , . — -(NH) b —CO-OR 5 (wherein W represents a lower alkylene group, R 5 represents a hydrogen atom, a lower alkyl group, or a phenyl-lower alkyl group, and b is 0 or 1) , —Z—CO—R a -{wherein Z represents a lower alkylene group, R a represents -Tyr(OR al )-OR bl , —Leu—OR b2 , -Trp-OR b3 , -Asp(OR a2 )-OR b4 , -Ph-Gly-OR b5 (wherein R al and R a2 each represents a hydrogen atom or a benzyl group, and R bl , R b2 , R b3 , R h and R b5 each represents a hydrogen atom or a lower alkyl group) or — (R 6 )—R 7 (wherein R 6 represents a lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl- lower alkyl group, a phenyl-lower alkyl group, a lower cycloalkyl group, a phenyl group which may have 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a lower alkoxycarbonyl group, a phenyl-lower alkoxy group, a lower alkylenedioxy group, a morpholino group, a halogenated lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl-lower alkyl group, a 6-hydroxy- 2,5,7,8-tetramethyl-2-chromanylmethyloxy group and a 6-lower alkanoyloxy-2,5,7,8-tetramethyl-2- chromanylmethyloxy group, a naphthyl group, a 3,4- dihydroxycarbostyryl group, a morpholino group, or a 5-membered or 6-membered unsaturated heterocyclic- lower alkyl group having 1 or 2 hetero atoms selected from a nitrogen atom, an oxygen atom and a sulfur atom, and R 7 represents a hydrogen atom or a lower alkyl group)}, or a group: {wherein B represents a lower alkylene group, R 8 represents a hydroxyl group, a nitro group, an amino group, a halogen atom, a lower alkyl group, a lower alkoxy group, a phenoxy group, a phenyl-lower alkyl group, a lower alkylthio group, a phenyl hio group which may have a halogen atom, a phenyl-lower alkylthio group, a benzoylamino group which may have 1 to 3 halogen atoms, or —O—D—R 9 (wherein D represents a lower alkylene group, R 9 represents a phenyl group which may have 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group on the phenyl ring thereof (the phenyl ring may be condensed with a benzene ring or a cyclohexane ring), a 5-membered or 6-membered, saturated or unsaturated heterocyclic group having a hetero atom selected from a nitrogen atom, a sulfur atom and an oxygen atom (the heterocyclic ring may be condensed with a benzene ring and 1 to 5, in total, substituents selected from a hydroxyl group and a lower alkyl group may be located on either one or both of the heterocyclic ring or the benzene ring being condensed with the heterocyclic ring), a lower cycloalkyl group or a naphthoguinone group), and n is an integer of from 1 to 3}; X represents —S— or —N(R 10 )— (wherein R 10 represents a hydrogen atom or a lower alkoxycarbonyl-lower alkyl group); UTT represents a single bond or a double bond; A, when is a single bond, represents a carbonyl group, or A, when TZT is a double bond, represents =C(R U )- -{wherein R 11 represents a lower alkyl group which may have 1 to 3 halogen atoms, a lower alkoxycarbonyl-lower alkyl group, a carboxy-lower alkyl group, a pyridyl group, a thienyl group, a thiazolyl group, a phenylcarbamoyl-lower alkyl group which may have 1 or 2 lower alkoxy groups on the phenyl ring thereof, or a group: (wherein R 12 represents a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a phenylthio group, or a phenyl-lower alkoxy group which may have 1 to 3 halogen atoms on the phenyl ring thereof, and m is an integer of from 1 to 3)}; and the above R* and R 10 may bind to each other to form a 6- to 8-membered ring (with the proviso that A represents a carbonyl group in this case), and R 3 and R 11 may bind to each other to form a 5- to 8-membered ring, with the proviso that, when R 3 represents a hydrogen atom and A represents a carbonyl group, R 1 does not represent a hydrogen atom or a lower alkoxycarbonyl-lower alkyl group; or a pharmaceutically acceptable salt thereof . The compound and the salt thereof according to the present invention are useful for the treatment and/or the prevention of various diabetic complications such as coronary disease, a periphery circulatory disease, a cerebrovascular disorder, diabetic neurosis, a renal disease, an atherosclerosis, an articular sclerosis, a cataract, and retinitis or the diseases caused by aging, such as an atherosclerosis, a senile cataract, etc., by inhibiting the Maillard reaction. Further, the compound and the salt thereof according to the present invention have a hypoglycemic effect and thus are useful as an antidiabetic drug for treating diabetes mellitus. The compound and the salt thereof according to the present invention have various advantages including a long-lasting action, excellent absorption characteristics in vivo, a low toxicity, a high safety, a high stability as a compound and easiness in preparation. Each group as herein used iε described hereinafter in detail. Examples of the lower alkoxycarbonyl-lower alkyl group include alkoxycarbonylalkyl groups in which the alkoxy moiety haε from 1 to 6 carbon atoms and the alkyl moiety has from 1 to 6 carbon atoms, such as methoxycarbonylmethyl, ethoxycarbonylmethyl, 3-methoxycarbonylpropyl, 4-ethoxy- carbonylbutyl, 6-propoxycarbonylhexyl, 5-iεopropoxy- carbonylpentyl, 1,1-dimethyl-2-butoxycarbonylethyl, 2-methyl- 3-tert-butoxycarbonylpropyl, 2-pentyloxycarbonylethyl, hexyloxycarbonylmethyl, and the like. Exampleε of the halogen atom, regardless of whether it exists independently or exists in other groups, include fluorine, chlorine, bromine and iodine atoms. Examples of the lower alkyl group, regardless of whether it exists independently or existε in other groups, include straight chain or branched alkyl groups having from 1 to 6 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, tert-butyl, pentyl, hexyl, and the like. Examples of the lower alkoxy group, regardlesε of whether it exists independently or exists in other groups, include straight chain or branched alkoxy groupε having from 1 to 6 carbon atomε, such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, tert-butoxy, pentyloxy, hexyloxy, and the like. Examples of the lower alkylthio group include alkylthio groups in which the alkyl moiety is a straight chain or branched alkyl group having from 1 to 6 carbon atoms, such as methylthio, ethylthio, propylthio, butylthio, isopropylthio, tert-butylthio, pentylthio, hexylthio, and the like. Examples of the phenyl-lower alkyl group which may have from 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group on the phenyl ring thereof include phenyl-lower alkyl groups having a phenyl group which may have from 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a straight chain or branched lower alkyl group having from 1 to 6 carbon atoms, a straight chain or branched lower alkoxy group having from 1 to 6 carbon atoms and a straight chain or branched lower alkylthio group having from 1 to 6 carbon atoms on the phenyl ring thereof and in which the alkyl moiety is a straight chain or branched group having from 1 to 6 carbon atoms, such as benzyl, 2-phenylethyl, 1-phenylethyl, 3-phenylpropyl, 4-phenylbutyl, 1,1-dimethyl-2-phenylethyl, 5-phenylpentyl, 6-phenylhexyl, 2-methyl-3-phenylpropyl, 2-phenylpropyl, 2-fluorobenzyl, 3-fluorobenzyl, 4-fluoro¬ benzyl, 4-chlorobenzyl, 4-bromobenzyl, 4-iodobenzyl, 2-(2- fluorophenyl)ethyl, 3-(3-chlorophenyl)propyl, 4-(4-bromo- phenyl)butyl, 5-(4-iodophenyl)pentyl, 6-(3-fluorophenyl)- hexyl, 1,l-dimethyl-2-(2-chlorophenyl)ethyl, 2-methyl-3-(4- chlorophenyl)propyl, 2-(4-fluorophenyl)propyl, 2,5-difluoro¬ benzyl, 2,3-dichlorobenzyl, 2-(2,4-dibromophenyl)ethyl, 2-(2,6-difluorophenyl)ethyl, 3-(3,4-dichlorophenyl)propyl, 4-(3,5-dibromophenyl)butyl, 5-(3,4-difluorophenyl) entyl, 6-(3,5-dichlorophenyl)hexyl, 2,4,5-trifluorobenzyl, 2-(2,4,6- trichlorophenyl)ethyl, 3-(3,4,5-trifluorophenyl)propoxy, 2-hydroxybenzyl, 3-hydroxybenzyl, 4-hydroxybenzyl, 2-(2-hydroxyphenyl)ethyl, 3-(3-hydroxyphenyl)propyl, 4-(4-hydroxyphenyl)butyl, 5-(4-hydroxyphenyl)pentyl, 6-(3-hydroxyphenyl)hexyl, l,l-dimethyl-2-(2-hydroxyphenyl)- ethyl, 2-methyl-3-(4-hydroxyphenyl)propyl, 2-(4-hydroxy- phenyl)propyl, 2,5-dihydroxybenzyl , 2 ,3-dihydroxybenzyl , 2-(2,4-dihydroxyphenyl)ethyl, 2-(2,6-dihydroxyphenyl)ethyl, 3-(3,4-dihydroxyphenyl)propyl, 4-(3,5-dihydroxyphenyl)butyl, 5-(3,4-dihydroxyphenyl)pentyl, 6-(3,5-dihydroxyphenyl)hexyl, 2,4,5-trihydroxybenzyl, 2-(2,4,6-trihydroxyphenyl)ethyl, 3-(3,4,5-trihydroxyphenyl)propoxy, 2-nitrobenzyl, 3-nitrobenzyl, 4-nitrobenzyl, 2-(2-nitrophenyl)ethyl, 3-(3- nitrophenyl)propyl, 4-(4-nitrophenyl)butyl, 5-(4-nitro- pheny1)pentyl, 6-(3-nitrophenyl)hexyl, 1,1-dimethyl-2-(2- nitrophenyl)ethyl, 2-methyl-3-(4-nitrophenyl)propyl, 2-(4- nitrophenyl)propyl, 2,5-dinitrobenzyl, 2 ,3-dinitrobenzyl, 2- (2,4-dinitrophenyl)ethyl, 2-(2,6-dinitrophenyl)ethyl, 3-(3,4- dinitrophenyl)propyl, 4-(3,5-dinitrophenyl)butyl, 5-(3,4- dinitrophenyl)pentyl, 6-(3,5-dinitrophenyl)hexyl, 2,4,5- trinitrobenzyl, 2-(2,4,6-trinitrophenyl)ethyl, 3-(3,4,5- trinitrophenyl)propoxy, 2-methylbenzyl, 3-ethylbenzyl, 4-propylbenzyl, 4-butoxybenzyl, 4-pentylbenzyl, 4-hexylbenzyl, 4-isopropylbenzyl, 4-tert-butylbenzyl, 2-(2-methylphenyl)ethyl, 1-(3-ethylphenyl)ethyl, 3-(4-ethylphenyl)propyl, 4-(4-propylphenyl)butyl, 5-(4-butyl- phenyl)pentyl, 6-(4-pentylphenyl)hexyl, 1,l-dimethyl-2-(2- methylphenyl)ethyl, 2-(3-ethylphenyl)propyl, 2,3-dimethyl- benzyl, 2-(2,4-dimethylphenyl)ethyl, 3-(2,5-diethylphenyl)- propyl, 4-(2,6-diethylphenyl)butyl, 5-(3,4-dimethylphenyl)- pentyl, 6-(3,5-diethylphenyl)hexyl, 3,4,5-trimethylbenzyl, 2-(2,4,5-trimethylphenyl)ethyl, 3-(2,4,6-trimeth lphenyl)- propyl, 2-methoxybenzyl, 3-methoxybenzyl, 4-methoxybenzyl, 4-ethoxybenzyl, 4-propoxybenzyl, 4-isopropoxybenzyl, 4-butoxybenzyl, 4-tert-butoxybenzyl, 4-pentyloxybenzyl, 4-hexyloxybenzyl, 2,3-dimethoxybenzyl, 2,4-dimethoxybenzyl, 2,5-diethoxybenzyl, 2,6-diethoxybenzyl, 3,4-dimethoxybenzyl, 3,5-diethoxybenzyl, 2,3,4-trimethoxybenzyl, 2,3,5-trimethoxy- benzyl, 2,3,6-triethoxybenzyl, 3,4,5-triethoxybenzyl, 2-(2-methoxyphenyl)ethyl, 1-(3-ethoxyphenyl)ethyl, 2-(4-methoxyphenyl)ethyl, 3-(4-ethoxyphenyl)propyl, 3-(4- propoxyphenyl)ethyl, 4-(4-butoxyphenyl)butyl, 1,l-dimethyl-2- (4-methoxyphenyl)ethyl, 5-(4-pentyloxyphenyl)pentyl, 6-(4- hexyloxyphenyl)hexyl, 2-(4-methoxyphenyl)propyl, 2-(2,4- dimethoxypheny1)ethyl, 3-(3,4-diethoxypheny1)propyl, 2-(2,4,5-trimethoxyphenyl)ethyl, 3-(3,4,5-triethoxyphenyl)- propyl, 2-methylthiobenzyl, 3-(2-ethylthio)benzyl, 4-(3- propylthio)benzyl, 2-(2-methylthiophenyl)ethyl, 3-(3- methylthiophenyl)propyl, 4-(4-methylthiopheny1)butyl, 5-(4- methylthiophenyl)pentyl, 6-(3-methylthiophenyl)hexyl, 1,1- dimethyl-2-(2-methylthiophenyl)ethyl, 2-methyl-3-(4-methyl- thiophenyl)propyl, 2-(4-methylthiophenyl) ropyl, 2,5-di(4- butylthio)benzyl, 2,3-dimethylthiobenzyl, 2-(2,4-dimethyl- thiophenyl)ethyl, 2-(2,6-dimethylthiophenyl)ethyl, 4-(3,5- dimethylthiophenyl)butyl, 5-(3,4-dimethylthiophenyl)pentyl, 6-(3,5-dimethylthiophenyl)hexyl, 2,4,5-tri(6-hexylthio)- benzyl, 2-(2,4,6-trimethylthiophenyl)ethyl, 3-(3,4,5- trimethylthiophenyl)propoxy, and the like. Examples of the phenyl group which may have from 1 to 3 εubεtituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group include phenyl groups which may have from 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a straight chain or branched alkyl group having from 1 to 6 carbon atoms, a straight chain or branched alkoxy group having from 1 to 6 carbon atoms and a straight chain or branched alkylthio group having from 1 to 6 carbon atoms, such as phenyl, 2-fluoro¬ phenyl, 3-fluorophenyl, 4-fluorophenyl, 2-chlorophenyl, 3-chlorophenyl, 4-chlorophenyl, 4-bromophenyl, 4-iodophenyl, 2,3-dichlorophenyl, 2,4-difluorophenyl, 2,5-dibromophenyl, 2,6-dichlorophenyl, 3,4-difluorophenyl, 3.,5-dichlorophenyl, 2,3,5-trifluorophenyl, 3,4,5-trichlorophenyl, 2-hydroxy- phenyl, 3-hydroxyphenyl, 4-hydroxyphenyl, 2,5-dihydroxy- phenyl, 2,3-dihydroxyphenyl, 2,4,5-trihydroxyphenyl, 2-nitrophenyl, 3-nitrophenyl, 4-nitrophenyl, 2,3-dinitro- phenyl, 2,4,5-trinitrophenyl, 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 3-ethylphenyl, 4-ethylphenyl, 4-propylphenyl, 4-pentylphenyl, 4-hexylphenyl, 4-butylphenyl, 4-isopropyl- phenyl, 4-tert-butylphenyl, 2,3-dimethylphenyl, 2,4-diethyl- phenyl, 2,5-dimethylphenyl, 2,6-dimeth lpheny1, 3,4-dimethyl- phenyl, 3,5-diethylphenyl, 2,3,5-trimethylphenyl, 3,4,5- trimethylphenyl, 2-methoxyphenyl, 3-methoxyphenyl, 4-methoxy- phenyl, 3-ethoxyphenyl, 4-ethoxyphenyl, 4-propoxyphenyl, 4-iεopropoxyphenyl, 4-butoxyphenyl, 4-tert-butoxyphenyl, 4-pentyloxyphenyl, 4-hexyloxyphenyl, 2,3-dimethoxyphenyl, 2,4-diethoxyphenyl, 2,5-dimethylphenyl, 2,6-dimethoxyphenyl, 3,4-dimethoxyphenyl, 3,5-diethoxyphenyl, 2,3,5-trimethoxy- phenyl, 3,4,5-trimethoxyphenyl, 2-methylthiopheny1, 3-ethylthiophenyl, 4-propyl hiophenyl, 4-butylthiophenyl, 4-pentylthiophenyl, 4-hexylthiophenyl, 2,3-dimethylthio¬ phenyl, 2,4-dimethylthiophenyl, 3,4-dimethylthiophenyl, 3,4,5-trimethylthiophenyl, and the like. Examples of the lower alkanoylamino group, regardless of whether it exists independently or exists in other groups, include amino groups having a straight chain or branched alkanoyl group having from 1 to 6 carbon atoms, εuch as formylamino, acetylamino, propionylamino, butyrylamino, isobutyrylamino, pentanoylamino, tert-butylcarbonylamino, hexanoylamino, and the like. Examples of the phenylsulfonylamino group which may have a substituent selected from a halogen atom, a hydroxyl group, an amino group and a lower alkanoylamino group on the phenyl ring thereof include phenylsulfonylamino, 2-fluoro- phenylεulfonylamino, 3-fluorophenylεulfonylamino, 4-fluoro- phenylεulfonylamino, 2-chlorophenylsulfonylamino, 3-chloro- phenylεulfonylamino, 4-chlorophenylεulfonylamino, 4-bromo- phenylsulfonylamino, 4-iodophenylsulfonylamino, 2-hydroxy- phenylsulfonylamino, 3-hydroxyphenylsulfonylamino, 4-hydroxy- phenylεulfonylamino, 2-aminophenylεulfonylamino, 3-amino- phenylεulfonylamino, 4-aminophenylεulfonylamino, 2-acetyl- aminophenylεulfonylamino, 3-acetylaminophenylεulfonylamino, 4-acetylaminophenylsul onylamino, 2-butyrylaminophenyl- sulfonylamino, 3-butyrylaminophenylsulfonylamino, 4-butyryl- aminophenylεulfonylamino, and the like. Examples of the lower alkylidene group include straight chain or branched alkylidene groups having from 1 to 6 carbon atoms such as ethylene, ethylidene, propylidene, isopropylidene, butylidene, tert-butylidene, pentylidene, hexylidene, and the like. Examples of the lower alkylidene group having 1 or 2 lower cycloalkyl groups include εtraight chain or branched alkylidene groupε having 1 to 6 carbon atoms and having 1 or 2 cycloalkyl groups having 3 to 8 carbon atomε, εuch aε 2- cyclopropylethylidene, 1-cyclobutylethylidene, 3-cyclopentyl- propylidene, 4-cyclohexylbutylidene, 1,l-dimethyl-2-cyclo- heptylethylidene, 5-cyclooctylpentylidene, 6-cyclohexyl- hexylidene, 2-methyl-3-cyclohexylpropylidene, dicyclopropyl- methylene, 2-dicyclopropylethylidene, and the like. Exampleε of the lower cycloalkylidene group include cycloalkylidene groupε having from 3 to 8 carbon atoms εuch aε cyclopropylidene, cyclobutylidene, cyclopentylidene, cyclohexylidene, cycloheptylidene, cyclooctylidene, and the like. Exampleε of the diphenyl-lower alkylidene group include diphenyl alkylidene groupε in which the alkylidene moiety is a straight chain or branched group having from 1 to 6 carbon atoms, such as 2,2-diphenylethylidene, 1,1-diphenyl- ethylidene, 3,3-diphenylpropylidene, 4 ,4-diphenylbutylidene, 5,5-diphenylpentylidene, 6,6-diphenylhexylidene, and the like. Examples of the phenyl-lower alkylidene group include phenylalkylidene groups in which the alkylidene moiety iε a straight chain or branched group having from 1 to 6 carbon atomε, such as benzylidene, 2-phenylethylidene, 1-phenyl- ethylidene, 3-phenylpropylidene, 4-phenylbutylidene, 1,1- dimethyl-2-phenylethylidene, 5-phenylpentylidene, 6-phenylhexylidene, 2-methyl-3-phenylpropylidene, 2-phenylpropylidene, and the like. Examples of the lower alkenyl group include straight chain or branched alkenyl groups having from 2 to 6 carbon atoms, such aε vinyl, allyl, 2-butenyl, 3-butenyl, 1-methyl- allyl, 2-pentenyl, 2-hexenyl, and the like. Exampleε of the phenyl-lower alkoxy-lower alkyl group include phenylalkoxyalkyl groups in which the alkoxy moiety is a εtraight chain or branched group having from 1 to 6 carbon atomε and the alkyl moiety iε a straight chain or branched group having from 1 to 6 carbon atoms, such as benzyloxymethyl, 2-phenylethoxymethyl, 1-phenylethoxyme hyl, 3-phenylpropoxymethyl, 4-phenylbutoxymethyl, 1,l-dimethyl-2- phenylethoxymethy1, 5-phenylpentyloxymethyl, 6-phenylhexyl- oxymethyl, 2-benzyloxyethyl, 3-benzyloxypropyl, 4-benzyloxy- butyl, 1,1-dimethyl-2-benzyloxyethyl, 5-benzyloxypentyl, 6-benzyloxyhexyl, 2-methyl-3-benzyloxypropyl, and the like. Examples of the phenyl group which may have a hydroxyl group include 2-hydroxyphenyl, 3-hydroxyphenyl, 4- hydroxyphenyl, and the like. Exampleε of the 5-membered or 6-membered unsaturated heterocyclic-lower alkyl group having 1 or 2 hetero atoms selected from a nitrogen atom and a sulfur atom (the heterocyclic ring may be condensed with a benzene ring and hydroxyl groups may be located aε a substituent on either one or both of the heterocyclic ring and the benzene ring being condensed therewith) include εtraight chain or branched alkyl groupε having from 1 to 6 carbon atomε which have a 5-membered or 6-membered unεaturated heterocyclic ring having 1 or 2 hetero atomε selected from a nitrogen atom and a sulfur atom, such as 2-pyridinylmethyl, 3-pyridinylmethyl, 4-pyridinylmethyl, 2-(3-pyridinyl)ethyl, 3-(3-pyridinyl)- propyl, 4-(3-pyridinyl)butyl, 5-(3-pyridinyl)pentyl, 6-(3- piperidinyl)hexyl, l-methyl-2-(3-pyridinyl)propyl, 2-hydroxy- 3-pyridinylmethyl, 4-hydroxy-3-pyridinylmethyl, 6-hydroxy-3- pyridinylmethyl, 2-thienylmethyl, 3-thienylmethyl, 2-(2- thienyl)ethyl, 3-(2-thienyl) ropyl, 4-(2-thienyl)butyl, 5-(2- thienyl)pentyl, 6-(2-thienyl)hexyl, l-methyl-2-(2-thienyl)- propyl, 3-hydroxy-2-thienylmethyl, 5-hydroxy-2-thienylmethyl, 1-imidazolylmethyl, 2-imidazolylmethyl, 4-imidazolylmethyl, 5-imidazolylmethyl, 2-(4-imidazolyl)ethyl, 3-(4-imidazolyl)- propyl, 4-(4-imidazolyl)butyl, 5-(4-imidazolyl)pentyl, 6-(4- imidazolyl)hexyl, l-methyl-2-(4-imidazolyl)propyl, 2-hydroxy- 4-imidazolylmethyl, 1-indolylmethyl, 3-indolylmethyl, 2-(3- indolyl)ethyl, 3-(3-indolyl)propyl, 4-(3-indolyl)butyl, 5-(3- indolyl)pentyl, 6-(3-indolyl)hexyl, 4-hydroxy-3-indolyl- methyl, 2-hydroxy-3-indolylmethyl, 6-hydroxy-3-indolylmethyl, 2-pyrrolylmethyl, 5-pyrazolylmethyl, 2-pyrimidinylmethyl, 2-pyrazinylmethyl, 2-thiazolylmethyl, 2-quinolylmethyl, 2-benzoimidazolylmethyl, 3-benzothienylmethyl, and the like. Exampleε of the lower alkylene group include εtraight chain or branched alkylene groupε having from 1 to 6 carbon atomε, εuch aε methylene, ethylene, triethylene, 2-methyl- triethylene, 2,2-dimethyltrimethylene, 1-methyltrimethylene, methylmethylene, ethylmethylene, tetramethylene, pentamethylene, hexamethylene, and the like. Exampleε of the phenyl-lower alkyl group include phenylalkyl groupε in which the alkyl moiety iε a straight chain or branched group having from 1 to 6 carbon atoms, such aε benzyl, 2-phenylethyl, 1-phenylethyl, 3-phenylpropyl, 4-phenylbutyl, 1,l-dimethyl-2-phenylethyl, 5-phenylpentyl, " 6-phenylhexyl, 2-methyl-3-phenylpropyl, 2-phenylpropyl, and the like. Examples of the carboxy-lower alkyl group include carboxyalkyl groups in which the alkyl moiety is a straight chain or branched group having from 1 to 6 carbon atoms, such as carboxymethyl, 2-carboxyethyl, 1-carboxyethyl, 3-carboxy- propyl, 4-carboxybutyl, 1,l-dimethyl-2-carboxyethyl, 5-carboxypentyl, 6-carboxyhexyl, 2-methyl-3-carboxypropyl, and the like. Examples of the lower cycloalkyl group include cycloalkyl groups having from 3 to 8 carbon atoms such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclo- heptyl, cyclooctyl, and the like. Exampleε of the lower alkoxycarbonyl group include alkoxycarbonyl groupε in which the alkoxy moiety is straight chain or branched group having from 1 to 6 carbon atomε, εuch aε methoxycarbonyl, ethoxycarbonyl, propoxycarbonyl, isopropoxycarbonyl, butoxycarbonyl, tert-butoxycarbonyl, pentyloxycarbonyl, hexyloxycarbonyl, and the like. Examples of the phenyl-lower alkoxy group include phenylalkoxy groupε in which the alkoxy moiety iε a εtraight chain or branched group having from 1 to 6 carbon atomε, εuch as benzyloxy, 2-phenylethoxy, 3-phenylpropoxy, 1-phenyliso- propoxy, 4-phenylbutoxy, 5-phenylpentyloxy, 6-phenylhexyloxy, 2-methyl-3-phenylpropoxy, and the like. Exampleε of the halogenated lower alkyl group include εtraight chain or branched halogenated alkyl groupε having from 1 to 3 halogen atomε and in which the alkyl moiety is a straight chain or branched group having from 1 to 6 carbon atomε, εuch as chloromethyl, bromomethyl, iodomethyl, fluoromethyl, dichloromethyl, dibromomethyl, difluorometh l, trichloromethyl, tribromomethyl, trifluoromethyl, 2-chloro- ethyl, 2-bromoethyl, 2-fluoroethyl, 1,2-dichloroethyl, 2,2- difluoroethyl, l-chloro-2-fluoroethyl, 3-fluoropropyl, 4-chlorobutyl, 5-chloropentyl, 6-bromohexyl, 3-fluoro-2- methylpropyl, and the like. Exampleε of the lower alkylenedioxy group include alkylenedioxy groupε having from 1 to 3 carbon atomε, εuch aε methylenedioxy, ethylenedioxy, trimethylenedioxy, and the like. Exampleε of the phenyl group which may have from 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a lower alkoxycarbonyl group, a phenyl-lower alkoxy group, a lower alkylenedioxy group, a morpholino group, a halogenated lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl-lower alkyl group, a 6-hydroxy-2,5,7,8- tetramethyl-2-chromanylmethyloxy group and a 6-lower alkanoyloxy-2,5,7,8-tetramethyl-2-chromanylmethyloxy group include phenyl groups which may have from 1 to 3 εubεtituentε selected from a halogen atom, a hydroxyl group, a nitro group, a straight chain or branched alkyl group having from 1 to 6 carbon atomε, a straight chain or branched alkoxy group having from 1 to 6 carbon atoms, a straight chain or branched alkylthio group having from 1 to 6 carbon atoms, a carboxy group, an alkoxycarbonyl group in which the alkoxy moiety is a straight chain or branched alkoxy group having from 1 to 6 carbon atoms, a phenylalkoxy group in which the alkoxy moiety is a straight chain or branched group having from 1 to 6 carbon atoms, an alkylenedioxy group, a morpholino group, a halogenated alkyl group having from 1 to 3 halogen atoms in which the alkyl moiety is a straight chain or branched group having from 1 to 6 carbon atoms, a carboxyalkyl group in which the alkyl moiety is a straight chain or branched group having from 1 to 6 carbon atoms, an alkoxycarbonylalkyl group in which the alkoxy moiety has from 1 to 6 carbon atoms and the alkyl moiety has from 1 to 6 carbon atoms, a 6-hydroxy- 2,5,7,8-tetramethyl-2-chromanylmethyloxy group and a 6- alkanoyloxy-2,5,7,8-tetramethyl-2-chromanylmethyloxy group in which the alkanoyloxy moiety is an alkanoyloxy group having from 1 to 6 carbon atoms, such as phenyl, 2-fluorophenyl, 3- fluorophenyl, 4-fluorophenyl, 2-chlorophenyl, 3-chlorophenyl, 4-chlorophenyl, 4-bromophenyl, 4-iodophenyl, 2,3- dichlorophenyl, 2,4-dichlorophenyl, 2,4-difluorophenyl, 2,5- dibromophenyl, 2,6-dichlorophenyl, 3,4-difluorophenyl, 3,5- dichlorophenyl, 2,3,5-trifluorophenyl, 3,4,5-trichlorophenyl, 2-hydroxyphenyl, 3-hydroxyphenyl, 4-hydroxyphenyl, 2-(2- hydroxy)phenyl, 3-(3-hydroxy)phenyl, 4-(4-hydroxy)phenyl, 5- (4-hydroxy)phenyl, 6-(3-hydroxy) henyl, 1,1,-dimethyl-2-(2- hydroxy)phenyl, 2-methyl-3-(4-hydroxy)phenyl, 2-(4-hydroxy)- phenyl, 2,5-dihydroxyphenyl, 2,3-dihydroxyphenyl, 2-(2,4- dihydroxy)phenyl, 2-(2,6-dihydroxy)phenyl, 3-(3,4-dihydroxy)- phenyl, 4-(3,5-dihydroxy)phenyl, 5-(3,4-dihydroxy)phenyl, 6-(3,5-dihydroxy)phenyl, 2,4,5-trihydroxyphenyl, 2-(2,4,6- trihydroxy)phenyl, 3-(3,4,5- rihydroxy)phenyl, 2-nitrophenyl, 3-nitrophenyl, 4-nitrophenyl, 2-(2-nitro)phenyl, 3-(3-nitro)- phenyl, 4-(4-nitro)phenyl, 5-(4-nitro)phenyl, 6-(3-nitro)- phenyl, 1,1-dimethyl-2-(2-nitro)phenyl, 2-methyl-3-(4-nitro)- phenyl, 2-(4-nitro)phenyl, 2,5-dinitrophenyl, 2,3-dinitro- phenyl, 2-(2,4-dinitro)phenyl, 2-(2,6-dinitro)phenyl, 3-(3,4- dinitro)phenyl, 4-(3,5-dinitro)phenyl, 5-(3,4-dinitro)phenyl, 6-(3,5-dinitro)phenyl, 2,4,5-trinitrophenyl, 2-(2,4,6- trinitro)phenyl, 3-(3,4,5-trinitro)phenyl, 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 3-ethylphenyl, 4-ethylphenyl, 4-propylphenyl, 4-pentylphenyl, 4-hexylphenyl, 4-butylphenyl, 4-isopropylphenyl, 4-tert-butylphenyl, 2,3-dimethylphenyl, 2,4-diethylphenyl, 2,5-dimethylphenyl, 2,6-dimethylphenyl, 3,4-dimethylphenyl, 3,5-diethylphenyl, 2,3,5-trimethylphenyl, 3,4,5- rimethylphenyl, 2-methoxyphenyl, 3-methoxyphenyl, 4-methoxyphenyl, 3-e hoxyphenyl, 4-ethoxyphenyl, 4-propoxy- phenyl, 4-isopropoxyphenyl, 4-butoxyphenyl, 4-tert-butoxy- phenyl, 4-pentylphenyl, 4-hexylphenyl, 2,3-dimethoxypheny1, 2,4-diethoxyphenyl, 2,5-dimethylphenyl, 2,6-dimethoxyphenyl, 3,4-dimethoxyphenyl, 3,5-diethoxyphenyl, 2,3,5-trimethoxy- phenyl, 3,4,5-trimethoxyphenyl, 2-methyl hiophenyl, 3-ethylthiophenyl, 4-propylthiophenyl, 4-butylthiophenyl, 4-pentylthiophenyl, 4-hexylthiophenyl, 2,3-dimethylthio- phenyl, 2,4-dimethylthiophenyl, 2,6-dimethylthiophenyl, 2,4,6-trimethylthiophenyl, 2-carboxyphenyl, 3-carboxyphenyl, 4-carboxyphenyl, 2,3-dicarboxyphenyl, 3,4-dicarboxyphenyl, 2,4-dicarboxyphenyl, 2-methoxycarbonylphenyl, 3-methoxy- carbonylphenyl, 4-methoxycarbonylphenyl, 2-ethoxycarbonyl- phenyl, 3-ethoxycarbonylphenyl, 4-ethoxycarbonylphenyl, 4-iεopropoxycarbonylphenyl, 4-pentyloxycarbonylphenyl, 4-propoxycarbonylphenyl, 4-tert-butoxycarbonylphenyl, 4-hexyloxycarbonylphenyl, 3,4-dimethoxycarbonylphen 1, 2,4-dimethoxycarbonylphenyl, 2,3-dimethoxycarbonylphenyl, 3-methoxycarbonyl-4-ethoxycarbonylphenyl, 3,4-diethoxy- carbonylphenyl, 2,4-diethoxycarbonylphenyl, 2,3-diethoxy- carbonylphenyl, 2-benzyloxyphenyl, 3-benzyloxyphenyl, 4-benzyloxyphenyl, 2,4-dibenzylphenyl, 4,6-dibenzylphenyl, 4-(2-phenylethoxy)phenyl, 4-(3-phenylpropoxy)phenyl, 4-(4- phenylbutoxy)phenyl, 4-(5-phenylpentyloxy)phenyl, 4-(6-phenylhexyloxy)phenyl, 2,3-methylenedioxyphenyl, 3,4-methylenedioxyphenyl, 2,3-ethylenedioxyphenyl, 3,4-ethylenedioxyphenyl, 2,3-propylenedioxyphenyl, 3,4-propylenedioxyphenyl, 2-morpholinophenyl, 3-morpholino- phenyl, 4-morpholinophenyl, 2-chloromethylphenyl, 3-bromo- methylphenyl, 4-iodomethylphenyl, 2-fluoromethylphenyl, 2-dichloromethylphenyl, 4-dibromomethylphenyl, 3-difluoro¬ methylphenyl, 3-trichloromethylphenyl, 3-trifluoromethyl¬ phenyl, 4-trifluoromethylphenyl, 4-(1,2-dichloroethyl)phenyl, 2-(3-fluoropropyl)phenyl, 3-(4-chlorobutyl)phenyl, 4-(5- chloropentyl)phenyl, 4-(6-bromohexyl)phenyl, 2-(2-chloro- ethyl)-4-dibromomethylphenyl, 2,3,4-tri(chloromethyl)phenyl, 2-carboxymethylphenyl, 3-carboxymethylphenyl, 4-carboxy- methylphenyl, 3,5-di(carboxymethyl)phenyl, 4-(2-carboxy- ethyl)phenyl, 3-(4-carboxybutyl)phenyl, 4-(6-carboxy- hexyl)phenyl, 2-methoxycarbonylmethylphenyl, 3-methoxy- carbonylmethylphenyl, 4-methoxycarbonylmethylphenyl, 2,6-di- (methoxycarbonylmethy1)phenyl, -ethoxycarbonylmethylpheny1, 3-butoxycarbonylmethylphenyl, 4-(4-ethoxycarbonylbutyl)- phenyl, 3-(6-hexyloxycarbonylhexyl)phenyl, 3-(6-hydroxy- 2,5,7,8-tetramethylchroman-2-yl)methoxyphenyl, 4-(6-hydroxy- 2,5,7,8-tetramethylchroman-2-yl)methoxyphenyl, 3-(6- propionyloxy-2,5,7,8-tetramethylchroman-2-yl)methoxyphenyl, 4-(6-hexanoyloxy-2,5,7,8-tetramethylchroman-2-yl)methoxy- phenyl, 4-(6-acetoxy-2,5,7,8-tetramethylchroman-2-yl)methoxy- phenyl, 2-carboxy-4-methylphenyl, 3-carboxy-6-methylphenyl, 4-carboxy-6-methylphenyl, 2-carboxy-4-ethylphenyl, 2-carboxy- 4-chlorophenyl, 3-carboxy-6-bromophenyl, 4-carboxy-6- chlorophenyl, 2-carboxy-4-bromophenyl, 2-methoxycarbonyl-5- methylphenyl, 3-methoxycarbonyl-6-methylphenyl, 2-methoxy- carbonyl-4-ethylphenyl, 4-ethoxycarbonyl-6-methylphenyl, 2-methoxycarbonyl-6-chlorophenyl, 3-methyl-5-fluorophenyl, 2-carboxy-3-fluoro-4-methylphenyl, 2-carboxy-4-methyl-6- methoxyphenyl, and the like. Exampleε of the 5-membered or 6-membered unεaturated heterocyclic-lower alkyl group having 1 or 2 hetero atomε εelected from a nitrogen atom, oxygen atom and a εulfur atom include unεaturated heterocyclic-lower alkyl groups in which the alkyl moiety has from 1 to 6 carbon atoms, εuch as 2-pyridinylmethy1, 3-pyridinylmethy1, 4-pyridinyl ethy1, 2-(3-pyridinyl)ethyl, 3-(3-pyridinyl)propyl, 4-(3-pyridinyl)- butyl, 5-(3-pyridin 1)pentyl, 6-(3-pyridiny1)hexyl, 1-methyl- 2-(3-pyridinyl)propyl, 2-thienylmethyl, 3-thienylmethyl, 4-thienylmethyl, 2-(2-thienyl)ethyl, 3-(2-thienyl)propyl, 4-(2-thienyl)butyl, 5-(2-thienyl)pentyl, 6-(2-thienyl)hexyl, l-methyl-2-(2-thienyl)propyl, 1-imidazolylmethyl, 2-imidazolylmethyl, 4-imidazolylmethyl, 5-imidazolylmethyl, 2-(l-imidazolyl)ethyl, 3-(4-imidazolyl)propyl, 4-(4- imidazolyl)butyl, 5-(4-imidazolyl)pentyl, 6-(4- i idazoly1)hexyl, 1-methyl-2-(1-imidazoly1)propyl, 2-pyrrolylmethyl, 2-pyrimidinylmethyl, 2-pyrazinylme hyl, 2-thiazolyl methyl, 2-furylmethyl, 3-f rylme hyl, 2-(2-furyl)ethyl, 3-(3-furyl)propyl, 4-(2-furyl)butyl, 5-(3-furyl)pentyl, 6-(2-furyl)hexyl, and the like. Examples of the phenylthio group which may have a halogen atom include 2-chlorophenylthio, 3-chlorophenylthio, 4-chlorophenylthio, 2-bromophenylthio, 4-bromophenylthio, 3-fluorophenylthio, 4-fluorophenylthio, 4-iodophenylthio, and the like. Exampleε of the phenyl-lower alkylthio group include phenylalkylthio groups in which the alkyl moiety iε a εtraight chain or branched group having from 1 to 6 carbon atoms, such as benzylthio, 2-phenylethylthio, 1-phenylethyl- thio, 3-phenylpropylthio, 4-phenylbutylthio, 1,l-dimethyl-2- phenylethylthio, 5-phenylpentylthio, 6-phenylhexyl hio, 2-methyl-3-phenylpropyl hio, 2-phenylpropyl hio, and the like. Examples of the benzoylamino group which may have from 1 to 3 halogen atoms include benzoylamino groups which may have from 1 to 3 halogen atoms, such as benzoylamino, 2-fluorobenzoylamino, 3-fluorobenzoylamino, 4-flurobenzoyl- 5 amino, 2-chlorobenzoylamino, 3-chlorobenzoylamino, 4-chloro- benzoylamino, 4-bromobenzoylamino, 4-iodobenzoylamino, 2,3-dichlorobenzoylamino, 3,4-dichlorobenzoylamino, 2,4-dichlorobenzoylamino, 3,4,5-trichlorobenzoylamino, and the like. 10 Examples of the phenyl group which may have from 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group on the phenyl ring thereof (the phenyl ring may be condensed with a benzene ring or a 15 cyclohexane ring) include phenyl, 2-fluorophenyl, 3-fluoro¬ phenyl, 4-fluorophenyl, 2-chlorophenyl, 3-chlorophenyl, 4-chlorophenyl, 4-bromophenyl, 4-iodophenyl, 2,3-dichloro- phenyl, 2,4-difluorophenyl, 2,5-dibromophenyl, 2,6-dichloro- phenyl, 3,4-difluorophenyl, 3,5-dichlorophenyl, 2,3,5-tri- 20 fluorophenyl, 3,4,5-trichlorophenyl, 2-hydroxyphenyl, 3-hydroxyphenyl, 4-hydroxyphenyl, 2-(2-hydroxy)phenyl, 3-(3-hydroxy)phenyl, 4-(4-hydroxy)phenyl, 5-(4-hydroxy)- phenyl, 6-(3-hydroxy)phenyl, 1,l-dimethyl-2-(2-hydroxy)- phenyl, 2-methyl-3-(4-hydroxy)phenyl, 2-(4-hydroxy)phenyl, -r 25 2,5-dihydroxyphenyl, 2,3-dihydroxyphenyl, 2-(2,4-dihydroxy)- phenyl, 2-(2,6-dihydroxy)phenyl, 3-(3,4-dihydroxy)phenyl, 4-(3,5-dihydroxy)phenyl, 5-(3,4-dihydroxy)phenyl, 6-(3,5- dihydroxy)phenyl, 2,4,5-trihydroxyphenyl, 2-(2,4,6- trihydroxy)phenyl, 3-(3,4,5-trihydroxy)phenyl, 2-nitrophenyl, 3-nitrophenyl, 4-nitrophenyl, 2-(2-nitro)phenyl, 3-(3-nitro)- phenyl, 4-(4-nitro)phenyl, 5-(4-nitro)phenyl, 6-(3-nitro)- phenyl, l,l-dimethyl-2-(2-nitro)phenyl, 2-methyl-3-(4-nitro)- phenyl, 2-(4-nitro)phenyl, 2,5-dinitrophenyl, 2,3-dinitro- phenyl, 2-(2,4-dinitro)phenyl, 2-(2,6-dinitro)phenyl, 3-(3,4- dinitro)phenyl, 4-(3,5-dinitro)phenyl, 5-(3,4-dinitro)phenyl, 6-(3,5-dinitro)phenyl, 2,4,5-trinitrophenyl, 2-(2,4,6- trinitro)phenyl, 3-(3,4,5-trinitro)phenyl, 2-methylphenyl, 3- methylphenyl, 4-methylphenyl, 3-ethylphenyl, 4-ethylphenyl, 4-propylphenyl, 4-pentylphenyl, 4-hexylphenyl, 4-butylphenyl, 4-isopropylphenyl, 4-tert-butylphenyl, 2,3-dimethylphenyl, 2,4-diethylphenyl, 2,5-dimethylphenyl, 2,6-dimethylphenyl, 3,4-dimethylphenyl, 3,5-diethylphenyl, 2,3,5-trimethylphenyl, 3,4,5-trimethylphenyl, 2-me hoxyphenyl, 3-me hoxyphenyl, 4-methoxyphenyl, 3-ethoxyphenyl, 4-ethoxyphenyl, 4-propoxy¬ phenyl, 4-iεopropoxyphenyl, 4-butoxyphenyl, 4-tert-butoxy- phenyl, 4-pentylphenyl, 4-hexylphenyl, 2,3-dimethoxyphenyl, 2,4-diethoxypheny1, 2,5-dimethylpheny1, 2,6-dimethoxypheny1, 3,4-dimethoxyphenyl, 3,5-diethoxyphenyl, 2,3,5-trimethoxy- phenyl, 3,4,5-trimethoxyphenyl, 2-methylthiophenyl, 3-ethylthiophenyl, 4-propylthiophenyl, 4-butylthiophenyl, 4-pentylthiophenyl, 4-hexyl hiophenyl, 2,3-dimethyl hio¬ phenyl, 2,4-dimethylthiophenyl, 2,6-dimethyl hiophenyl, 2,4,6-trimethylthiophenyl, 1-naphthyl, 2-naphthyl, 5,6,7,8- tetrahydro-1-naphthyl, 5,6,7,8-tetrahydro-2-naphthyl, and the like. Exampleε of the 5-membered or 6-membered, εaturated or unsaturated heterocyclic ring group having a hetero atom selected from a nitrogen atom, a sulfur atom and an oxygen atom (the heterocyclic ring may be condensed with a benzene ring and 1 to 5 substituentε εelected from a hydroxyl group and a lower alkyl group may be located on the heterocyclic ring or the benzene ring being condenεed with the heterocyclic ring) include 2-pyrrolyl, 3-pyrrolyl, 2-thienyl, 2-furanyl, 3-f ranyl, 2-pyridinyl, 3-pyridinyl, 4-pyridinyl, 2-pyrrolidinyl, 3-pyrrolidinyl, 2-tetrahydrothionyl, 2-tetrahydrofuranyl, 3-piperidinyl, 2-tetrahydrothiopyranyl, 2-tetrahydropyranyl, 3-indolyl, 2-dihydrobenzopyranyl, 3-dihydrobenzopyranyl, 5-methyl-2-pyrrolyl, 5-methyl-2- thienyl, 5-methyl-2-pyridinyl, 3,5-dimethyl-2-pyridinyl, 4,6-dihydroxy-2-pyridinyl, 6,8-dihydroxy-2-dihydrobenzo- pyranyl, 6-hydroxy-2,5,7-trimethyl-2-dihydrobenzopyranyl, and the like. Examples of the phenylcarbamoyl-lower alkyl group which may have 1 or 2 lower alkoxy groups on the phenyl ring thereof include phenylcarbamoylalkyl groups which may have 1 or 2 alkoxy groups on the phenyl ring thereof in which the alkoxy moiety haε from 1 to 6 carbon atoms and the alkyl moiety haε from 1 to 6 carbon atom , εuch aε phenyIcarbamoylmethy1, phenylcarbamoylethy1, phenylcarbamoyl- propyl, phenylcarbamoylbutyl, phenylcarbamoylpentyl, phenyl- carbamoylhexyl, 2-metoxyphenylcarbamoylmethyl, 3-methoxy- phenylcarbamoylmethyl, 4-methoxyphenylcarbamoylmethy1, 4-ethoxyphenylcarbamoylmethyl, 4-butoxyphenylcarbamoylmethy1, 4-propoxyphenylcarbamoylmethy1, 2-ethoxy-4-butoxyphenyl- carbamoylmethyl, 4-pentyloxyphenylcarbamoylmethyl, 4-hexyl- oxyphenylcarmaboylmethyl, 2,6-dimethoxyphenylcarbamoylmethyl, 2-(2,4-dimethoxyphenylcarbamoyl)ethyl. Abbreviations of amino acids, etc. as uεed herein are expreεεed in accordance with the specification of IUPAC and IUB or those commonly employed in the art, for example, Tyr means tyrosine, Leu means leucine, Trp means tryptophan, Asp means aεpartic acid and Ph-Gly means phenylglycine. When R 1 is a hydrogen atom and A is a carbonyl group in the compound of the general formula (1) , the compound may have the following isomer εtructureε (1A) to (IE). (ID) (1 C) (1A) (IB) R" OH X NH Y 2 N-R (IE) The compound of the general formula (1) includeε within itε scope all of these isomerε aε well aε other stereoiεomers, optical isomers, and geometrical isomerε. The compounds represented by the general formula (1 ) partially include known compoundε, but moεt of these compounds are novel oneε. The compoundε of the general formula (1 ) can be produced by variouε methods such aε, for example, by the methodε εhown in the following reaction steps . Reaction Step 1: R 3 H NC-NHR 2 + R 10 -NH-CH-COOR 13 2 II NH (3) In the above formulae, R 1 , R 2 , R 3 and R 10 have the same meaning as described above, and R 13 representε a uεual eεter residue. Examples of the ester reεidue represented by R 13 include a lower alkyl group having from 1 to 6 carbon atomε and a phenyl-lower alkyl group. The reaction between the compound of the general formula (2) or the acid addition εalt thereof and the compound of the general formula (3) or the acid addition salt thereof is carried out in a suitable solvent in the presence or absence of a deoxidizing agent at a temperature of from about room temperature to 200°C, preferably from about 60 to 100°C. Examples of the acid addition salt include hydrochloride and sulfate. Examples of the deoxidizing agent include alkali metal alcholates εuch aε sodium methoxide and sodium ethoxide, and basic compounds εuch aε potaεsium carbonate, sodium carbonate, sodium hydroxide, sodium hydrogencarbonate, triethylamine, tripropylamine, pyridine, quinoline, 4-dimethylaminopyridine and εodiu acetate. Solventε suitable for the above reaction are lower alcohols such as methanol, ethanol and iεopropanol, ethers such as dioxane, tetrahydrofuran, ethylene glycol dimethyl ether and diethyl ether, aromatic hydrocarbons such aε benzene, toluene and xylene, tertiary amineε εuch aε triethylamine and tripropylamine and polar solvents such as dimethylformamide and dimethylsulfoxide. The amount of the compound represented by the general formula (3) or the acid addition salt thereof is suitably at least an equimolar amount to the compound represented by the general formula (2) or the acid addition salt thereof, and iε preferably from about 1 to 3 molar times as much as the latter compound. The above- mentioned reaction smoothly proceedε at a temperature of from about 15 to 200°C, and preferably from about 60 to 100°C, and is generally completed within about 1 to 24 hours. Reaction Step 2: R 3 R 1 NH-C-NHR 2 ÷ Y-CH-COOR 1 - II S (5) Y N-R " In the above formulae, R 1 , R 2 and R 3 have the εame meaning aε deεcribed above, R repreεentε a uεual ester residue, and Y represents a halogen atom or a lower alkanesulfonyloxy group. Examples of the ester residue represented by R include a lower alkyl group having from 1 to 6 carbon atoms and a phenyl-lower alkyl group. Examples of the lower alkanesulfonyloxy group include, for example, alkanesulfonyl groups such as methanesulfonyloxy and ethaneεulfonyloxy. The reaction between the compound of the general formula (4) and the compound of the general formula (5) iε carried out by using a common solvent in the presence of a deoxidizing agent. As the deoxidizing agent, any of those cited as the deoxidizing agent to be used in the reaction between the compound (2) and the compound (3 ) in the above reaction step 1 may be used. As the solvent, commonly employed ones are usable over a wide range, and any of the solvents usable in the reaction between the compound (2) and the compound (3) in the above reaction step 1 may be used therefor. The reaction temperature may be from room temperature to about 150°C, and preferably from about 50 to 100°C. The amount of the compound represented by the general formula (5) is suitably at least an eguimolar amount to the compound represented by the general formula (4 ) , and iε preferably from about 1 to 3 molar times aε much as the latter compound. The amount of the deoxidizing agent is suitably at least 1 to 10 molar times as much as the compound shown by the general formula (4), and preferably from about 1 to 3 molar times as much as the latter compound. The reaction time usually ranges from about 1 to 36 hours. Reaction Step 3: In the above formulae, R 1 , R 2 and R a have the same meaning as described above, R 15 repreεents —Z—COOH, and R 16 repreεents —Z—CO—R a wherein Z has the same meaning as described above. By the reaction shown by the reaction step 3, the amine compound represented by the general formula (6) is reacted with the carboxylic acid represented by the general formula (lc) by a conventional a ido bond-forming reaction. Known conditions for the amido bond-forming reactions can easily be applied to thiε amido bond-forming reaction. Examples of these methods include: (a) a mixed acid anhydride method which compriseε reacting the carboxylic acid (lc) with an alkylhalocarboxylic acid to give thereby a mixed acid anhydride and then reacting this product with the amine (6) ; (b) an active ester method which compriseε converting the carboxylic acid (lc) into an active ester, such as p- nitrophenyl ester, N-hydroxysuccinimide ester, or 1-hydroxy- benzotriazole ester and then reacting with the amine (6); (c) a carbodiimide method which comprises condensing the carboxylic acid (lc) with the amine (6) in the presence of an activating agent such aε dieyelohexylcarbodiimide, water-εoluble carbodiimide or carbonyl diimidazole; and (d) other methods, for example, the one which compriseε converting the carboxylic acid (lc) into a carboxylic anhydride with a dehydrating agent such as acetic anhydride and then reacting with the amine (6) , the one which comprises reacting an ester of the carboxylic acid (lc) with a lower alcohol or a phenyl-lower alcohol with the amine (6) at a high temperature under a high presεure, or another one which compriseε reacting a halogenated carboxylic acid (lc), i.e., a carboxylic acid halide with the amine (6). The mixed acid anhydride to be used in the above mixed acid anhydride method (a) can be obtained by a usual Schotten-Baumann reaction. It may be usually reacted with the amine (6) without isolation and thus the compound of the general formula (Id) can be produced. This Schotten-Baumann reaction is carried out in the presence of a basic compound. Examples of the basic compound to be used here include those conventionally employed in the Schotten-Baumann reaction, such as organic baseε (e.g., triethylamine, trimethylamine, pyridine, dimethylaniline, N-methylmorpholine, 1,5- diazobicyclo[4.3.0]nonene-5(DBN) , 1,8-diazabicyclo[5.4.0]- undecene-7 (DBU) , and 1,4-diazabicyclo[2.2.2]octane(DABCO) ) , and inorganic baεes (e.g., potasεium carbonate, εodium carbonate, potaεεium hydrogencarbonate, and εodium hydrogencarbonate) . This reaction is usually carried out at a temperature of from about -20 to 100°C, and preferably at from about 0 to 50°C. The reaction time ranges from 5 minuteε to 10 hourε, and preferably from 5 minuteε to 2 hours. The reaction between the mixed acid anhydride thus obtained and the amine (6) iε uεually carried out at a temperature of from about -20 to 150°C, and preferably from about 10 to 50°C. The reaction time rangeε from 5 minuteε to 10 hourε, and preferably from 5 minuteε to 5 hours. The mixed acid anhydride method is usually carried out in a solvent. As the εolvent, any solvent conventionally used for mixed acid anhydrides may be used. Specific examples of the solvent include halogenated hydrocarbons such as chloroform, dichloromethane and dichloroethane, aromatic hydrocarbons such as benzene, toluene and xylene, ethers such as diethyl ether, diiεopropyl ether, tetrahydrofuran and dimethoxyethane, eεterε such as methyl acetate and ethyl acetate, aprotic polar solvents such as N,N-dimethyl- formamide, dimethylsulfoxide, acetonitrile and hexamethyl- phoεphoric triamide, and mixtureε of theεe εolventε . Examples of the alkyl halocarboxylic acid to be used in the mixed acid anhydride method include methyl chloroformate, methyl bromoformate, ethyl chloroformate, ethyl bromoformate, and isobutyl chloroformate. In this method, the carboxylic acid (lc) is usually used in an equimolar amount to the alkyl halocarboxylic acid and the amine (6), though the alkyl halocarboxylic acid and the carboxylic acid (lc) may be used each in an amount of from 1 to 1.5 molar times aε much aε the amine (6) . Among the above-mentioned other methods (d), the reaction between the carboxylic acid halide with the amine (6) may be carried out in a suitable solvent in the presence of a basic compound. As the basic compound, publicly known compounds may be used over a wide range. Examples of the basic compound include basic compounds to be used in the above-mentioned Shotten-Baumann reaction aε well aε εodium hydroxide, potassium hydroxide, sodium hydride and potassium hydride. Examples of the solvent include the solventε to be used in the above mixed acid anhydride method as well as alcoholε such as methanol, ethanol, propanol, butanol, 3- methoxy-1-butanol, ethylcellosolve and methylcelloεolve, pyridine, acetone and water. The ratio of the amine (6) to the carboxylic acid halide iε not particularly restricted but selected over a wide range. Usually, the former compound is used at least in an equimolar amount to the latter compound, and preferably from 1 to 5 molar times as much as the latter. This reaction is carried out at a temperature of from about -20 to 180°C, and preferably from about 0 to 150°C. It is completed within 5 minutes to 30 hours in general. Also, the amido bond-forming reaction shown by the above reaction step 3 may be carried out by reacting the carboxylic acid (lc) with the amine (6) in the presence of a condensing agent of a phoεphoruε compound such as triphenylphosphine, diphenylphosphinyl chloride, phenyl-N- phenylphoεphoramide chloridate, diethyl chlorophoεphate, diethyl cyanophoεphate, diphenyl phosphoric azide, and bis(2- oxo-3-oxazolidinyl)phoεphonic chloride. Thiε reaction iε carried out in a εolvent in the preεence of a basic compound, each being the same as the one used in the above reaction between the carboxylic acid halide with the amine (6), uεually at a temperature of from about -20 to 150°C, and preferably from about 0 to 100°C. Thiε reaction iε completed uεually within 5 minuteε to 30 hourε. It iε preferable that the condenεing agent and the carboxylic acid (lc) are each used in an amount at least equimolar to the amine (6) , and preferably 1 to 2 molar times as much as the amine. It is preferable that the carboxyl groups in the above carboxylic acid (lc) and the amine (6), other than those which undergo the reaction, are protected. Reaction step 4: R 15 R 18 -Y Y 2 N-R In the above formulae, R 2 and R 15 have the same meaning aε described above, and R 18 represents a lower alkoxycarbonyl-lower alkyl group or a phenyl-lower alkyl group which may have from 1 to 3 subεtituentε εelected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group on the phenyl ring thereof. The reaction- between the compound of the general formula (le) and the compound of the general formula (7) iε carried out in a suitable solvent in the preεence of a deoxidizing agent. Aε the deoxidizing agent, any of the deoxidizing agentε to be used in the reaction between the compound (2) and the compound (3) in the above reaction step 1 may be used. As the solvent, conventional ones may be used over a wide range. For example, any solvent to be used in the reaction between the compound (2) and the compound (3) in the above reaction step 1 may be used. The ratio of the compound of the general formula (le) to the compound of the general formula (7) is not particularly restricted but appropriately selected over a wide range. In usual, it is preferable to use the latter compound at least in an equimolar amount to the former, and preferably from 1 to 3 molar times as much as the former. This reaction smoothly proceedε at a temperature of from about 15 to 200°C, and preferably from about 30 to 80°C. It is usually completed within about 1 to 24 hours. The compound of the present invention containing a carboxyl group can be obtained by hydrolyzing the ester corresponding thereto in a conventional manner. The following reaction is given by way of example. Reaction Step 5: 0 19 « R -C-Z Hydrolysis In the above formulae, R 1 , R 2 and Z have the same meaning as described above, R 19 represents a group having an ester reεidue among the oneε defined by R a , and R 20 represents a group having a carboxyl residue among the ones defined by R a . The compound of the general formula (lh) is produced by hydrolyzing the compound of the general formula (lg) in a suitable solvent in the presence of an alkali. Examples of the alkali include sodium hydroxide and potassium hydroxide. As the εolvent, conventional ones may be used over a wide rage. Examples thereof include methanol, ethanol, dioxane, tetrahydrofuran and water. The alkali is suitably used in an amount of 1 to 3 molar times as much as the compound of the general formula (lg). Thiε hydrolyεiε εmoothly proceedε usually at a temperature of from about 15 to 200°C, and preferably from about 30 to 60°C. It is generally completed within 1 to 24 hours. Reaction Step 6: R 0 R 21 -Y HN NH Y (8) N-R In the above formulae, R 2 and R 3 have the same meaning as described above, and R 21 represents a lower alkoxycarbonyl-lower alkyl group or a phenyl-lower alkyl group which may have from 1 to 3 substituents selected from a halogen atom, a lower alkyl group and a lower alkoxy group on the phenyl ring thereof. The reaction between the compound of the general formula (li) and the compound of the general formula (8) iε carried out in a εuitable εolvent in the preεence of a deoxidizing agent. As the deoxidizing agent, any of the deoxidizing agents to be used in the reaction between the compound (2) and the compound (3) in the above reaction step 1 may be used. The solvent may be selected from common oneε over a wide range. For example, any of the solventε to be used in the reaction between the compound (2) and the compound (3) in the above reaction step 1 may be used. The ratio of the compound of the general formula (li) to the compound of the general formula (8) is not particularly restricted but appropriately selected over a wide range. In uεual, the latter compound iε preferably uεed at least in an equimolar amount to, and preferably from 1 to 3 molar times as much as the former compound. This reaction εmoothly proceeds at a temperature of from about 15 to 200°C, and preferably from about 60 to 100°C. It is generally completed within about 1 to 24 hours. Reaction Step 7: X' R" 11 H 2 N-C-NHR 1 Y-CH-CO-R" (9) (10) R 3 In the above formulae, R 2 , R 3 , R π and Y have the same meaning as described above, and =X' representε =S or =NH. The reaction between the compound of the general formula (9) and the compound of the general formula (10) iε carried out in a εuitable solvent in the presence of a deoxidizing agent. As the deoxidizing agent, any of the deoxidizing agents to be used in the reaction between the compound (2) and the compound (3) in the above reaction εtep 1 may be used. The solvent may be selected from common ones over a wide range. For example, any of the solvents to be used in the reaction between the compound (2) and the compound (3) in the above reaction step 1 may be used. The ratio of the compound of the general formula (9) to the compound of the general formula (10) iε not particularly reεtricted but appropriately εelected over a wide range. In usual, the latter compound is preferably used at least in an equimolar amount to, and preferably from 1 to 3 molar timeε aε much aε the former compound. Thiε reaction εmoothly proceedε at a temperature of from about 15 to 200°C, and preferably from about 60 to 100°C. It is generally completed within about 1 to 24 hours. Reaction Step 8 : ( 1 1 ) In the above formulae, R 1 and Y have the same meaning as described above, R 3 ' has the same meaning as R 3 except for a hydrogen atom, R 22 representε a lower alkoxycarbonyl-lower alkyl group, a phenyl-lower alkyl group which may have from 1 to 3 εubεtituentε εelected from a halogen atom, a lower alkyl group and a lower alkoxy group on the phenyl ring thereof or a phenyl group which may have from 1 to 3 εubεtituentε εelected from a halogen atom, a lower alkyl group and a lower alkoxy group, and p iε an integer of from 1 to 3. The reaction between the compound of the general formula (11) and the compound of the general formula (12) iε carried out in a εuitable εolvent in the preεence of a εtrongly basic compound. Examples of the strongly basic compound include alkyl lithium compounds such as butyl lithium and t-butyl lithium. The solvent may be selected from conventional ones over a wide range. Exampleε thereof include etherε such as tetrahydrofuran, dioxane and diethyl ether, hydrocarbonε εuch aε hexane and hexamethylphoεphoric triamide. Regarding the ratio of the compound of the general formula (11) to the compound of the general formula (12), the latter compound iε preferably used at least in an equimolar amount to, and preferably from 1 to 3 molar times as much as the former compound. This reaction smoothly proceeds at a temperature of from about -70 to 15°C, and preferably from about -70 to -30°C. It is generally completed within about 1 to 24 hours. Reaction Step 9 H, N-C-NH-R' R 23 -NH-CH 2 -COOR 13 1 II NH (14) (13) (15) (17) (11-a) (11-b) In the above formulae, R 2 , R 13 , R 22 , Y and p have the same meaning as described above, and R 23 represents a lower alkoxycarbonyl-lower alkyl group. The reaction between the compound of the general formula (13) and the compound of the general formula (14) is carried out under the same reaction conditions as those employed in the reaction between the compound (2) and the compound (3) in the above reaction εtep 1. The reaction between the compound of the general formula (15) and the compound of the general formula (16) is carried out under the same reaction conditions as those employed in the reaction between the compound (li) and the compound (8) in the above reaction εtep 6. The reaction whereby the compound of the general formula (11) is obtained from the compound of the general formula (17) is carried out in the presence of an organic or inorganic, acidic compound. As the organic or inorganic, acidic compound, hydrochloric acid, sulfuric acid, trifluoroacetic acid, acetic acid or formic acid may be used. Among these compounds, diluted strong acids εuch aε hydrochloric acid and εulfuric acid are particularly preferable. Aε the εolvent, conventional εolvents which are stable to acids may be used. Examples thereof include methanol, ethanol, dioxane, tetrahydrofuran and water. The acidic compound is generally used in an amount of from 1 to 20 molar times as much aε the compound of the general formula (17). Thiε reaction iε carried out usually at a temperature of from about 30 to 120°C for about 5 to 60 minutes. The compound of the general formula (5), which is used as the starting material in the above reaction step 2, wherein R 3 is R 6 NHC0Z— and Y is a lower alkanesulfonyloxy group may be produced by, for example, the following method. Reaction Step 10: 2- CO OH R NH Z-CONHR 6 2 I (6) 1 'i HO-CH-COOR 14 -^ HO-CH-COOR j4 (18) (19) R^S0 2 X 1 Z-CONHR' (2 °) — _ R 2<l SO 2 0-CH-COOR N Deoxydizing (5a) agent In the above formulae, R 6 , R 14 and Z have the same meaning as described above, R u representε a lower alkyl group, and X 1 repreεentε a halogen atom. The reaction between the compound of the general formula (18) and the compound of the general formula (6) is carried out in a suitable solvent. Examples of the solvent include water, ethers such as tetrahydrofuran and dioxane, dimethylformamide and mixtures of these solventε . Thiε reaction is carried out usually at a temperature of from about -10 to 40°C, and preferably at around room temperature. This reaction is usually completed within about 5 minutes to 1 hour. The reaction between the compound of the general formula (19) and the compound of the general formula (20) is carried out in a suitable solvent in the presence of a deoxidizing agent. Examples of the solvent include halogenated hydrocarbonε εuch aε dichloromethane, chloroform and carbon tetrachloride, aromatic hydrocarbonε εuch aε benzene and toluene, etherε such as dioxane, tetrahydrofuran and diethyl ether, and mixtures of these solvents. As the deoxidizing agent, any of the deoxidizing agents to be used in the reaction between the compound (2 ) and the compound (3) in the above reaction step 1 may be used. This reaction is carried out usually at a temperature of from about -20 to 30°C, and preferably from -5 to 10°C. This reaction is usually completed within about 10 to 30 minutes. When the starting material (18) in this reaction is an optically active compound, the corresponding product (5a) can be obtained as an optically active compound, too. The compoundε of the general formula ( 1 ) include pharmaceutically acceptable addition εaltε thereof formed with acidε or baεic compoundε . Theεe εaltε can be easily formed by reacting an acid or a base with the compound of the present invention. The acids uεed for forming the εalt include, for example, inorganic acidε εuch aε hydrochloric acid, sulfuric acid, phosphoric acid, hydrobromic acid, etc., and, organic acids εuch as oxalic acid, maleic acid, fumaric acid, malic acid, tartaric acid, citric acid, benzoic acid, etc. Also, the baεic compounds used for forming the salts include, for example, sodium hydroxide, potasεium hydroxide, calcium hydroxide, εodium carbonate, potassium hydrogencarbonate, etc. When R 11 is a phenylcarbamoyl-lower alkyl group which may have 1 or 2 lower alkoxy groups on the phenyl ring thereof, it can be obtained by reacting a compound in which the corresponding R u has a carboxy-lower alkyl group with phenylamine which may have 1 or 2 lower alkoxy groups on the phenyl ring thereof in the same manner as the amido bond- forming reaction in the reaction step 3. The compound of the general formula (1 ) produced by each method described above and the salt thereof can be easily isolated from the reaction system and purified by a conventional separation means such aε a diεtillation method, a recryεtallization method, column chromatography, a preparative thin-layer chromatography, a εolvent extraction 10 method, etc. The Maillard reaction inhibitor of the present invention is usually used in the form of a general pharmaceutical preparation. The preparation is prepared by , c using a diluent or an excipient commonly employed in the art such as a filler, an extender, a binder, a humidifying agent, a disintegrating agent, a surface active agent, a lubricant, etc. As the pharmaceutical preparation, various forms can be selected according to the purpose of the treatment. Typical 20 examples thereof are tabletε, pills, powders, liquidε, εuspensionε, emulεions, granules, capsules, suppoεitorieε, injections (liquids, suεpenεions, etc.), ointments, etc. For forming tablets, excipients such as lactose, sucroεe, εodium chloride, glucoεe, urea, starch, calcium carbonate, kaolin, 25 crystalline cellulose, silicic acid etc.; binders such as water, ethanol, propanol, simple syrup, a glucose solution, a starch solution, a gelatin solution, carboxymethyl cellulose, shellac, methyl cellulose, potassium phosphate, polyvinyl pyrrolidone, etc.; disintegrating agents such as dry starch, sodium alginate, an agar powder, a laminaran powder, sodium hydrogencarbonate, calcium carbonate, polyoxyethylene sorbitan fatty acid esters, sodium lauryl sulfate, stearic acid monoglyceride, starch, lactose, etc.; disintegration inhibitorε such as sucrose, stearin, cacao butter, a hydrogenated oil etc.; absorption accelerators such as quaternary ammonium bases, sodium lauryl sulfate, etc.; moisture keeping agents such as glycerol, starch, etc.; absorbents such as starch, lactose, kaolin, bentonite, colloidal silicic acid, etc.; lubricants such as purified talc, stearateε, a boric acid powder, polyethylene glycol, etc.; can be used as carrierε . Furthermore, if necessary, the tablets may be applied with ordinary coating to form, for example, sugar-coated tablets, gelatin-coated tablets, enteric coated tablets, film-coated tablets, double coated tablets, and multilayer tablets. For forming pillε, excipientε εuch aε glucose, lactose, starch, cacao butter, hardened vegetable oils, kaolin, talc, etc.; binders such as a gum arabic powder, a tragacanth rubber powder, gelatin, ethanol, etc.; disintegrating agents such as laminaran, agar, etc.; can be used as carriers. For forming suppoεitorieε , polyethylene glycol, cacao butter, higher alcoholε , higher alcohol esters, gelatin, semi-εynthetic glyceride, etc.; can be uεed as carriers . The preparation of capsules is carried out by mixing the compound of the present invention with various carriers described above and filling the mixture in hard gelatin capsuleε, hard capεuleε, etc, in accordance with a conventional manner. In the case of preparing injections, liquids, emulsionε, or εuεpenεions are sterilized and preferably made as isotonic to blood. For preparing the injectionε, water, an aqueouε lactic acid εolution, ethanol, propylene glycol, ethoxylated isostearyl alcohol, polyoxy¬ ethylene sorbitan fatty acid esters, etc. , can be used as a diluent. In this case, for preparing an isotonic εolution, a sufficient amount of sodium chloride, glucose, or glycerol may be incorporated in the pharmaceutical preparation or an ordinary disεolution aid, a buffer, a pain alleviating agent, etc., may be added thereto. Furthermore, if necessary, a coloring agent, a preservative, a perfume, a flavoring agent, a sweetening agent, etc. and other pharmaceutical agents may be incorporated in the pharmaceutical preparation. For forming pastes, creams and gels, white vaεeline, paraffin, glycerol, a cellulose derivative, polyethylene glycol, silicone, bentonite, etc., can be uεed aε a diluent. The amount of the compound of the present invention to be contained in the pharmaceutical preparation of the present invention can be properly selected in a wide range without being limited but is usually from 1 to 70 % by weight in the pharmaceutical preparation. Although there iε no particular reεtriction on the adminiεtration method of the pharmaceutical preparation of the preεent invention, and the variouε methods can be selected according to the age, sex, and other conditions of patients, the state of the disease, and the form of the preparation, the pharmaceutical preparation is usually administered syεtemically or topically by oral or parenteral adminiεtration. For example, the compound of the preparation iε orally adminiεtrated in the form of tabletε, pillε, liquids, suspenεionε, emulεionε, granules or capsules or is adminiεtrated in the form of injections or as a mixture with other ordinary auxiliary liquid by intravenouε injection, percutaneouε injection, subcutaneous injection, or intraperitoneal injection. Further, the preparation can be administrated in the rectum as a suppository or can be applied as an ointment. The dose of the pharmaceutical preparation of the present invention is properly selected according to the age, weight, conditions of disease, treatment effect, administration method, treating time, etc. of patients, but is usually administrated at a dose in the range of from about 0.1 to 100 mg per kg of body weight per day. The preparation may be administrated once to several times per day. As the matter of course, the dosage level changes by various conditions as discuεsed above. Thus, as the case may be, the doεage may be less than the above-described range or over the range. Now, the productions of the starting compounds are shown below as Referential Exampleε, the productionε of the compounds for use in the preεent invention are εhown below as Examples, and the pharmacological test resultε of these compounds and Preparation Examples are also εhown below. REFERENTIAL EXAMPLE 1 Production of 2-benzylidenehydrazono-l-methoxycarbonylmethyl- 10 imidazolidin-4-one: To a methanol solution of sodium methoxide prepared by disεolving 2.30 g of metal εodium in 150 ml of methanol waε added 5.70 g of benzylideneaminoguanidine, and, after εtirring the mixture for one hour at room temperature, 11.35 ■ j c g of iminodiacetic acid diethyl eεter was added thereto, followed by refluxing under heating for 17 hours. After cooling the reaction mixture, water and chloroform were added thereto to distribute the mixture between aqueous and organic layers and, then, the aqueous layer was extracted three times 20 with chloroform. The organic layer was combined with the extract. After drying over anhydrous magneεium εulfate, the mixture was concentrated under reduced pressure, and the reεidue waε charged on silica gel column chromatography, followed by elution with a mixed solvent of chloroform and 25 methanol (100 : 1 (v/v)). Thus 2.61 g of 2-benzylidene- - 51 hydrazono-l-methoxycarbonylmethylimidazolidin-4-one was obtained. .p. 149 - 153°C. NMR (CDC1 3 ) 6 ppm: 3.77 (s, 3H), 4.01 (s, 2H), 4.23 (s, 2H), 7.32 - 7.68 (m, 5H) , 8.26 (ε, IH). REFERENTIAL EXAMPLE 2 10 Production of 2-benzylidenehydrazono-3-ethoxycarbonylmethyl- l-methoxycarbonylmethylimidazolidin-4-one: 96 Milligrams of 60 % sodium hydride was εuspended in 20 ml of dimethylformamide under ice-cooling and 254 mg of .c the 2-benzylidenehydrazono-l- methoxycarbonylmethylimidazolidin-4-one obtained in the above Referential Example 1 was slowly dropped thereto, followed by stirring at 80°C for one hour. After cooling the reaction mixture, water and chloroform were added thereto to _ n distribute the mixture between aqueous and organic layers and, then, the aqueous layer waε extracted three timeε with chloroform. The organic layer was combined with the extract. After drying over anhydrous magnesium sulfate, the mixture was concentrated under reduced pressure, and the residue was -,. recrystallized from chloroform/n-hexane. Thuε 320 mg of 2- benzylidenehydrazono-3-ethoxycarbonylmethyl-l-methoxy- carbonylmethylimidazolidin-4-one was obtained. NMR (CDCI 3 ) δ ppm: 1.29 (t, J = 7.0 Hz, 3H) , 3.71 (s, 3H), 4.17 (q, J = 5.9 Hz, 2H) , 4.14 (ε, 2H), 4.41 (s, 2H), 4.71 (s, 2H), 10 7.25 - 7.60 (m, 5H) , 8.13 (ε, IH). REFERENTIAL EXAMPLE 3 Production of 7-ethoxycarbonylmethyl-l,4 ,5,7-tetraaza- bicyclof4,3,0]nonan-5-en-3, 8-dione: ,c To 230 mg of the 2-benzylidenehydrazono-3-ethoxy- carbonylmethyl-l-methoxycarbonylmethylimidazolidin-4-one obtained in the above Referential Example 2 waε added 10 ml of 0.5 N hydrochloric acid and the mixture was steam- distilled for 40 minutes. After cooling, the reaction 20 mixture was concentrated under reduced presεure and the reεidue waε charged on εilica gel column chromatography, followed by elution with a mixed solvent of chloroform and ethyl acetate (1 : 2 (v/v)). Thus 60 mg of 7-ethoxycarbonyl- methyl-1,4,5,7-tetraazabicyclo[4.3.0]nonan-5-en-3, 8-dione was 25 obtained. .p. 188 - 193°C. NMR (DMSO-d 6 ) δ ppm: 1.20 (t, J = 6.81 Hz, 3H) , 3.98 (8, 2H), 4.04 (q, J = 6.91 Hz, 2H) , 4.20 (s, 2H), 10.24 (s, IH). EXAMPLE 1 Production of 5-(4-benzyloxybenzyl)-2-isopropylidene- hydrazonoimidazolidin-4-one: To a methanol εolution of sodium methoxide prepared by dissolving 1.69 g of sodium metal in 60 ml of methanol was added 3.00 g of isopropylideneaminoguanidine sulfate, and, after stirring the mixture for one hour at room temperature, 11.83 g of O-benzyl-L-tyrosine methyl ester hydrochloride was added thereto, followed by refluxing under heating for 6 hours . After cooling the reaction mixture to room temperature, the insoluble matters were filtered off and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: chloroform) and further recrystallized from ethanol. Thus 2.15 g of the above-mentioned target compound waε obtained as white crystals . m.p. 172 - 173°C. NMR (DMS0-d 6 ) δ ppm: 1.82, 1.92 (s, ε, 6H), 2.8 - 3.0 (m, 2H) , 4.15 - 4.30 (m, IH) , 5.04 (s, 2H), 6.90 (d, 2H), 7.10 (d, 2H), 7.25 - 7.50 (m, 5H) . EXAMPLE 2 Production of 2-isopropylidenehydrazono-5-methylimidazolidin- 4-one: By following the similar procedure to the above Example 1 but substituting the O-benzyl-L-tyrosine methyl ester hydrochloride with L-alanine ethyl ester hydrochloride, the above-mentioned target compound was obtained, m.p. 126 - 128°C. NMR (DMSO-d 6 ) δ ppm: 1.22 (d, 3H, J = 6.8 Hz) , 1.89 1.94 (s, ε, 6H), 3.96 (q, IH, J = 6.8 Hz) , 7 - 51 ( s ' 1H )' 10.42 (brε, IH). EXAMPLE 3 Production of 5-benzyl-2-iεopropylidenehydrazonoimidazolidin- 4-one: By following the similar procedure to the above Example 1 but substituting the O-benzyl-L-tyrosine methyl ester hydrochloride with L-phenylalanine ethyl ester hydrochloride, the above-mentioned target compound was obtained. m.p. 148 - 149°C. NMR (DMSO-d 6 ) δ ppm: 1.84, 1.93 (s, s, 6H), 2.8 - 3.1 ( , 2H) , 4.13 - 4.38 ( , IH) , 7.26 (s, 5H). EXAMPLE 4 Production of 5-(4-hydroxybenzyl)-2-isopropylidenehydrazono- imidazolidin-4-one: By following the similar procedure to the above Example 1 but subεtituting the O-benzyl-L-tyrosine methyl ester hydrochloride with L-tyrosine ethyl ester hydrochloride, the above-mentioned target compound was obtained. m.p. 218 - 219°C. NMR (DMSO-d 6 ) δ ppm: 1.85, 1.93 (s, ε, 6H), 2.7 - 3.0 (i, 2H) , 4.08 - 4.38 (m, IH) , 6.68 (d, 2H), 7.01 (d, 2H), 7 . 31 ( ε , IH ) , 9 . 38 ( brs , IH ) . EXAMPLE 5 Production of 5-[4-(2, 6-dichlorobenzyloxy)benzyl]-2- iεopropylidenehydrazonoimidazolidin-4-one: By following the εi ilar procedure to the above Example 1 but εubεtituting the O-benzyl-L-tyrosine methyl ester hydrochloride with 0-2,6-dichlorobenzyl-L-tyrosine eεter hydrochloride, the above-mentioned target compound waε obtained. NMR (CDC1 3 ) δ ppm: 1.99 (ε, 3H), 2.05 (ε, 3H), 2.75 (dd, IH, J = 9.57, 14.19 Hz), 3.27 (dd, IH, J = 3.30, 13.85 Hz), 4.17 (dd, IH, J = 3.63, 9.56 Hz), 5.26 (d, 2H), 6.98 - 7.38 (m, 7H) . EXAMPLE 6 Production of 5-[ -(4-chlorobenzyloxy)benzyl]-2-iεopropyl- idenehydrazonoimidazolidin-4-one: By following the similar procedure to the above Example 1 but substituting the O-benzyl-L-tyrosine methyl ester hydrochloride with 0-4-chlorobenzyl-L-tyrosine ethyl eεter hydrochloride, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) 6 ppm: 1.82, 1.92 (2s, 6H), 2.85 (dd, IH, Jgem = 13.86 Hz, J = 4.62 Hz), 2.95 (dd, IH, J = 4.95 Hz) , 4.20 (dd, IH), 5.04 (ε, 2H), 6.86 - 7.13 (m, 4H), 7.39 - 7.49 ( , 5H), 10.50 (brs, IH). EXAMPLE 7 Production of 5-(4-hydroxyphenyl)-2-isopropylidenehydrazono- imidazolidin-4-one: By following the similar procedure to the above Example 1 but substituting the O-benzyl-L-tyrosine methyl eεter hydrochloride with D-phenylglycine ethyl eεter hydrochloride, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.92, 1.94 (2s, 6H), 4.85 (s, IH), 6.69 - 7.17 (m, 4H) , 7.98 (ε, IH), 9.57 (bs, IH). EXAMPLE 8 Production of 2-isopropylidenehydrazono-5-(4-phenylthio- benzyl)imidazolidin-4-one: By following the similar procedure to the above Example 1 but substituting the O-benzyl-L-tyrosine methyl ester hydrochloride with 4-phenylthiophenylalanine ethyl ester hydrochloride, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.99, 2.12 (2s, 6H), 3.09 (m, 2H), 4.66 (m, IH), 7.20 - 7.37 (m, 9H) . EXAMPLE 9 Production of 5-[N-(4-ethoxycarbonylphenyl)carbamoylmethyl]- 2-iεopropylidenehydrazonothiazolidin-4-one: To a εolution of 0.37 g of 5-carboxymethyl-2- isopropylidenehydrazonothiazolidin-4-one εyntheεized in accordance with the method described in JP-B-46-15936 and 0.26 g of ethyl 4-aminobenzoate in 10 ml of N,N-dimethyl- formamide was added 0.27 g of 1-hydroxybenztriazole hydrochloride. Subsequently, 0.34 g of l-ethyl-3-(3'- dimethylaminopropyl)carbodiimide hydrochloride was added thereto and the mixture was stirred at room temperature for 16 hours. Then the reaction mixture was poured into a mixture of 100 ml of 2 N hydrochloric acid with 100 ml of ethyl acetate. The organic phase thus separated was collected, washed with a saturated aqueous solution of sodium hydrogencarbonate and dried over anhydrous sodium sulfate. After distilling off the solvent under reduced pressure, the residue was purified by silica gel column chromatography (eluent: methylene chloride : methanol = 9 : 1). Thus 0.37 g of the above-mentioned target compound was obtained. NMR (DMS0-d 6 ) S ppm: 1.31 (t, 3H, J = 7.26 Hz) , 1.93 (s, 3H), 1.95 (ε, 3H), 2.93 (dd, IH, J = 9.23, 16.82 Hz), 3.20 (dd, IH, J = 3.96, 16.5 Hz), 4.24 - 4.36 (m, 3H), 7.69 (d, 2H, J = 8.90 Hz ) , 7.92 (d, 2H, J = 8.91 Hz), 10.46 (s, IH), 11.71 (brε, IH) . EXAMPLE 10 Production of 2-iεopropylidenehydrazono-5-( -propylcarbamoyl- methyl )thiazolidin-4-one: By following the similar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with propylamine, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 0.83 (t, 3H, J = 7.26 Hz) , 1.36 - 1.44 ( , 2H), 1.94 (brε, 6H) , 2.56 (dd, IH, J = 10.23, 16.17 Hz), 2.86 - 3.05 (m, 3H), 4.21 (dd, IH, J = 3.63, 9.9 Hz), 7.99 (t, IH, J = 5.61 Hz), 11.59 (brs, IH) . EXAMPLE 11 Production of 2-iεopropylidenehydrazono-5-[N-(2-oxo-l, 2, 3,4- tetrahydroquinolin-3-yl)carbamoylmethyl]thiazolidin-4-one: By following the similar procedure to the above Example 9 but subεtituting the ethyl 4-aminobenzoate with 3- amino-3,4-dihydroquinolin-2( lH)-one, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.95 (ε, 3H) 1.94 (ε, 3H) 2.51 - 3.32 (m, 4H), 4.23 - 4.27 |m, IH), 4.41 - 4.51 [ , IH), 6.86 - 7.22 [m. 4H), 8.43 ( , IH) 10.34 (d, IH J = 2.31 Hz) , 11.66 (brε, IH) EXAMPLE 12 Production of 5-(N-cyclohexylcarbamoylmethyl )-2-iso- propylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to the above •r _ Example 9 but εubεtituting the ethyl 4-aminobenzoate with cyclohexylamine, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.10 - 1.74 (m, 10H) , 0 1-94 (s, 6H), 2.53 (dd, IH), 2.87 (dd, IH, Jgem = 16.17 Hz, J = 3.96 Hz), 3.49 (m, IH), 4.20 (dd, IH, J = 10.06 Hz), 5 7.90 (d, IH, J - 7.92 Hz) , 11.62 (brs, IH) . EXAMPLE 13 Production of 5-(N-ethoxycarbonylmethylcarbamoylmethyl )-2- iεopropylidenehydrazonothiazolidin-4-one: 0 By following the εimilar procedure to the above Example 9 but εubstituting the ethyl 4-aminobenzoate with glycine ethyl eεter, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.20 (t, 3H), 1.94 (s, 6H), 2.68 (dd, IH, Jgem = 16.49 Hz, J = 6.26 Hz), 2.97 (dd, IH, J = 3.63 Hz ) , 3.83 (dd, 2H), 4.09 (q, 2H), 4.21 (dd, IH), 8.50 (t, IH, J = 5.94 Hz ) , 11.66 (ε, IH). EXAMPLE 14 Production of 5-[N-(4-carboxyphenyl )carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one: 2.73 Grams of 5-[N-(4-ethoxycarbonylphenyl)carbamoyl- methyl]-2-isopropylidenehydrazonothiazolidin-4-one produced in the above Example 9 was dissolved in 30 ml of dioxane. After adding 6.46 ml of 2 N sodium hydroxide, the mixture was heated to 50°C. After 1 hour, the solvent was distilled of . The residue was disεolved in 100 ml of water and adjusted to pH 2 with 2 N hydrochloric acid. The cryεtals thus formed were recovered by filtration and thus 2.02 g of the above- mentioned target compound was obtained. NMR (DMS0-d 6 ): 1.94 (s, 3H), 1.95 (s, 3H), 2.92 (dd, IH, J = 9.23, 16.82 Hz), 3.19 (dd, IH, J = 3.96, 16.83 Hz), 4.34 (dd, IH, J = 4.04. 9.23 Hz), 7.67 (d, 2H, J = 8.90 Hz) , 7.89 (d, 2H, J - 8.58 Hz ) , 10.43 (ε, IH). EXAMPLE 15 Production of 5-carboxymethyl-3-ethoxycarbonylmethyl-2- iεopropylidenehydrazonothiazolidin-4-one: 1.15 Gram of 5-carboxymethyl-2- iεopropylidenehydrazono-thiazolidin-4-one was disεolved in 30 ml of dimethylformamide and 0.24 g of 60 % εodium hydride waε added thereto in portionε under ice-cooling. After 30 minutes, 0.74 g of ethyl chloroacetate was added and the mixture was stirred at room temperature for 15 hours. The reaction mixture was poured into 200 ml of ice water and extracted with 200 ml of ethyl acetate. The organic layer was dried over anhydrous sodium sulfate and then the solvent was distilled off. The reεidue waε purified by εilica gel column chromatography (eluent: hexane : ethyl acetate = 1 : 1). Thus 0.36 g of the above-mentioned target compound was obtained. NMR (CDC1 3 ) δ ppm: 1.29 (t, 3H, J = 6.92 Hz ) , 2.02 (s, 3H), 2.04 (s, 3H) , 2.97 (dd, IH, J = 9.9, 17.48 Hz), 3.35 (dd, IH, J = 3.63, 17.82 Hz), 4.23 (q, 2H, J = 7.26 Hz ) , 4.31 (dd, IH, J = 3.63, 9.9 Hz), 4 . 66 ( s , 2H ) . EXAMPLE 16 Production of 2-isopropylidenehydrazono-3-phenylthiazolidin- 4-one: 0.19 Gram of acetone 4-phenyl-3-thiosemicarbazone waε dissolved in 7 ml of ethanol and 0.13 g of ethyl chloroacetate and 0.09 g of sodium acetate were succeεsively added thereto. After refluxing under heating for 15 hours, the mixture was allowed to cool and the crystals thus precipitated were recovered by filtration. Thus 0.13 g of the above-mentioned target compound was obtained as a white product. NMR (DMSO-d 6 ) δ ppm: 1.74 (s, 3H), 1-93 (ε, 3H), 4.03 (ε, 2H), 7.32 - 7.53 ( , 5H) . EXAMPLE 17 Production of 2-iεopropylidenehydrazino-4-methylthiazole: 0.79 Gram of acetone thiosemicarbazone was disεolved in 20 ml of ethanol and 0.69 g of chloroacetone and 0.59 g of sodium acetate were succeεεively added thereto. After refluxing under heating for 3 hourε, the mixture was allowed to cool. Then the insoluble matters were filtered off and the filtrate waε concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: methylene chloride : methanol = 10 : 1). Thus 0.18 g of the above-mentioned target compound was obtained. NMR (CDC1 3 ) δ ppm: 1.91 (s, 3H), 2.04 (s, 3H), 2.23 (s, 3H), 6.13 (s, IH). EXAMPLE 18 Production of 2-iεopropylidenehydrazino-4-phenylthiazole: By following the εimilar procedure to the above Example 17 but εubεtituting the chloroacetone with 2- bromoacetophenone, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1- 4 (ε, 3H), 1.96 (ε, 3H), 7.21 (s, IH), 7.25 - 7.42 (m, 3H) , 7.84 - 7.87 ( , 2H) , 10.95 (brs, IH) . EXAMPLE 19 Production of 4-(4-chlorophenyl)-2-isopropylidenehydrazino- thiazole: By following the similar procedure to the above Example 17 but substituting the chloroacetone with 2-bromo- 4 '-chloroacetophenone, the above-mentioned target compound was obtained. NMR (CDC1 3 ) δ ppm: 1.76 (s, 3H), 2.01 (ε, 3H), 6.81 (s, IH), 7.30 - 7.36 (m, 2H), 7.66 - 7.73 (m, 2H), 8.99 (brs, IH) . EXAMPLE 20 Production of 2-isopropylidenehydrazino-4-(4-phenyl- thiophenyl)thiazole: By following the similar procedure to the above Example 17 but substituting the chloroacetone with 2-bromo- 4 '-phenylthioacetophenone, the above-mentioned target compound was obtained. NMR (CDC1 3 ) δ ppm: 1.83 (s, 3H), 2.03 (ε, 3H), 6.83 (ε, IH), 7.22 - 7.36 (m, 7H) , 7.68 - 7.72 (m, 2H) , 8.67 (brε, IH). EXAMPLE 21 Production of 4-(3,4-dihydroxyphenyl )-2-iεopropylidene- hydrazinothiazole: By following the similar procedure to the above c Example 17 but subεtituting the chloroacetone with 2-chloro- 3 ' ,4 '-dihydroxyacetophenone, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.92 (s, 3H), 0 !-9 (ε, 3H), 6.73 (d, IH, J = 8.25 Hz ) , 6.85 (ε, IH), 7.12 (d, IH, J = 7.82 Hz ) , 7.23 (s, IH), 5 10.52 (brs, IH). EXAMPLE 22 Production of 4-[4-(4-chlorobenzyloxy)phenyl]-2-iso- propylidenehydrazinothiazole: By following the similar procedure to the above 0 Example 17 but substituting the chloroacetone with 4-(4- chlorobenzyloxy)phenacyl bromide, the above-mentioned target compound was obtained. NMR (DMS0-d 6 ) δ ppm: 1.89 (s, 3H), 5 1-93 (s, 3H), 5.12 (ε, 2H), 6.99 - 7.05 (m, 3H), 7.43 - 7.58 ( , 4H), 7.75 - 7.89 ( , 2H), 10.58 (s, IH). EXAMPLE 23 Production of 2-isopropylidenehydrazino-4,5, 6,7-tetrahydro- benzothiazole: By following the similar procedure to the above Example 17 but substituting the chloroacetone with 2- chlorocyclohexanone, the above-mentioned target compound was obtained. NMR (CDC1 3 ) 6 ppm: 1.73 - 1.84 (m, 4H), 1.87 (s, 3H), 2.02 (ε, 3H), 2.53 - 2.61 (m, 4H) . EXAMPLE 24 Production of 3-benzyl-5-(4-hydroxybenzyl)-2-isopropylidene- hydrazonoimidazolidin-4-one: 0.26 Gram of 5-(4-hydroxybenzyl)-2-isopropylidene- hydrazonoimidazolidin-4-one produced in the above Example 4 waε diεsolved in 5 ml of N,N-dimethylformamide. Then 0.18 g of benzyl bromide and 0.07 g of potaεsium carbonate were added thereto and the mixture was heated in an oil bath at 80°C for 8 hours. The reaction mixture was poured into 50 ml of ice water and extracted with 100 ml of ethyl acetate. The organic layer was dried over anhydrous εodium sulfate and the solvent was distilled off under reduced pressure. The reεidue waε purified by εilica gel column chromatography (eluent: chloroform : methanol = 10 : 1). Thus 0.11 g of the above-mentioned target compound was obtained. NMR(CDC1 3 ) δ ppm: 1.95 (s, 3H), 1.96 (ε, 3H), 2.77 (dd, IH, J = 7.92 Hz, 13.86 Hz), 3.12 (dd, IH, J = 3.96 Hz, 14.18 Hz), 4.23 (dd, IH, J = 3.63 Hz, 7.92 Hz), 4.70 (d, 2H, J = 2.64 Hz) , 6.61 - 6.64 (m, 2H) , 6.96 - 6.99 (m, 2H), 7.22 - 7.28 (m, 5H) . EXAMPLE 25 Production of 5-(4-hydroxybenzyl)-2-isopropylidenehydrazo-3- (4-methoxybenzyl)imidazolidin-4-one: By following the similar procedure to the above Example 24 but substituting the benzyl bromide with p- methoxybenzyl chloride, the above-mentioned target compound was obtained. NMR (CDC1 3 ) δ ppm: 1.96 (s, 3H), 1-99 (s, 3H), 2.75 (dd, IH, J = 7.92 Hz, 13.86 Hz), 3.09 (dd, IH, J = 3.95 Hz, 14.18 Hz), 4.21 (dd, IH, J = 3.63 Hz, 7.92 Hz), 4.61 (d, 2H, J = 2.97 Hz ) , 6.59 (d, 2H, J = 8.58 Hz) , 6.79 (d, 2H, J = 8.57 Hz) , 6.95 (d, 2H, J - 8.25 Hz), 7.23 (d, 2H, J = 8.57 Hz) . EXAMPLE 26 Production of 5-(4-benzyloxybenzyl)-2-iεopropylidene- hydrazonothiazolidin-4-one: 1.28 Gram of ethyl 3-(4-benzyloxyphenyl)-2- chloropropionate waε diεsolved in 20 ml of ethanol. After adding 0.63 g of acetone thioεemicarbazone and 0.40 g of εodium acetate, the mixture was refluxed under heating for 20 hours . Then the reaction mixture was concentrated under reduced pressure. After adding 50 ml of water, the mixture was extracted with 100 ml of ethyl acetate. The extract was dried over anhydrous sodium sulfate and the solvent was distilled off under reduced pressure. Then the reεidue waε purified by εilica gel column chromatography (eluent: hexane : ethyl acetate = 1 : 1 ) . Thuε 0.4 g of the above-mentioned target compound waε obtained. NMR (CDC1 3 ) δ ppm: 1.99 (ε, 3H), 2.02 (s, 3H), 2.94 (dd, IH, J = 10.23, 14.19 Hz), 3.48 (dd, IH, J = 3.63, 14.19 Hz), 4.21 (dd, IH, J = 3.63, 10.23 Hz), 5.04 (s, 2H), 6.90 - 7.41 (m, 9H) . EXAMPLE 27 Production of 2-isopropylideriehydrazono-5-(4-methyl- thiobenzyl )thiazolidin-4-one: By following the similar procedure to the above Example 26 but subεtituting the ethyl 3-(4-benzyloxyphenyl)■ 2-chloropropionate with ethyl 2-chloro-3-(4-methylthio- phenyl)propionate, the above-mentioned target compound was obtained. NMR (CDC1 3 ) δ ppm: 1.99 (s, 3H), 2.02 (ε, 3H), 2.47 (s, 3H), 2.95 (dd, IH, J = 10.23, 14.19 Hz), 3.49 (dd, IH, J ■= 3.96, 14.19 Hz), 4.22 (dd, IH, J = 3.63, 10.23 Hz), 10.04 (brs, IH) , 7.15 - 7.21 (m, 4H) . EXAMPLE 28 Production of 9-benzyloxymethyl-l ,4 ,5,7-tetraazabicyclo- [4,3, 0]nonan-5-en-3, 8-dione: 0.21 Gram of 1 ,4,5, -tetraazabicyclo[4 ,3, 0]nonan-5- en-3,8-dione, which waε a material obtained in the εame manner as the one described in Referential Example 3, was suspended in a mixture of 4 ml of tetrahydrofuran with 1 ml of hexamethylphosphorictriamide. Then 2.86 ml of a 1.6 M solution of butyl lithium in hexane was added dropwise thereto under cooling in a dry ice/acetone bath and the mixture was stirred at the εame temperature for 2 hourε . To thiε reaction mixture was dropped a εolution of 0.28 ml of benzylchloromethyl ether in 1 ml of hexamethylphoεphoric- triamide. Then the reaction mixture waε εtirred under cooling at -30 to -40°C for one hour and further under ice- cooling for 90 minuteε. After adding 20 ml of 1 N hydrochloric acid, the reaction mixture waε extracted with 80 ml of ethyl acetate. The extract waε dried over anhydrouε sodium sulfate and concentrated under reduced preεsure. The residue waε purified by preparative εilica gel thin-layer chromatography (developer: chloroform : methanol = 10 : 1). Thuε 0.05 g of the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 3.65 - 3.80 (m, 4H), 4.07 - 4.08 (m, IH) , 4.52 (s, 2H), 7.23 - 7.39 (m, 5H) , 10.15 (d, IH), 11.13 (brs., IH) . EXAMPLE 29 Production of 2-iεopropylidenehydrazono-5-(4-nitrobenzyl)- imidazolidin-4-one: By following the εimilar procedure to the above Example 1 but εubstituting the O-benzyl-L-tyroεine methyl eεter hydrochloride with 4-nitrophenylalanine ethyl eεter hydrochloride, the above-mentioned target compound waε obtained. NMR (DMS0-d 6 ) 8 ppm: 1-82, 1.92 (ε, ε, 6H), 3.06 (dd, IH, Jgem = 13.70, J = 4.83 Hz), 3.154 (dd, IH), 4.32 (t, IH), 7.48 (d, 2H), 8.14 (d, 2H), 7.63 (brs, IH), 10.62 (brε, IH). EXAMPLE 30 Production of 5-[4-(cyclohexylmethyloxy)benzyl]-2-iεo- propylidenehydrazonoimidazolin-4-one: By following the εimilar procedure to the above Example 1 but εubεtituting the O-benzyl-L-tyrosine methyl ester hydrochloride with O-cyclohexylmethyl-L-tyrosine ethyl ester hydrochloride, the above-mentioned target compound waε obtained. NMR ( DMSO-d 6 ) δ ppm : 2.83 (dd, IH, Jgem = 14.02 Hz, J = 4.78 Hz), 2.93 (dd, IH), 3.71 (d, 2H, J = 5.94 Hz), 4.18 (t, IH), 6.78 (d, 2H), 7.08 (d, 2H), 7.39 (brε, IH), 10.50 (brε, IH). 10 EXAMPLE 31 Production of 5-4-(benzylbenzyl)-2-iεopropylidenehydrazono- imidazolin-4-one: By following the εimilar procedure to the above Example 1 but εubεtituting the O-benzyl-L-tyroεine methyl , c eεter hydrochloride with 4-benzylphenylalanine ethyl eεter hydrochloride, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.99, 20 2.13 (2s, 6H), 3.03 (m, 2H), 3.83 (dd, 2H), 4.65 (t, IH), 6.99 - 7.30 ( , 10H) , 25 12.15 (brs, IH). EXAMPLE 32 Production of 5-[4-(4-chlorobenzoylamino)benzyl]-2-iso- propylidenehydrazonoimidazolidin-4-one: In 40 ml of ethanol and in the presence of 20 mg of ■- 10 % palladium carbon, 200 mg of 2-isopropylidenehydrazono-5- (4-nitrobenzyl)imidazolidin-4-one produced in the above Example 29 was catalytically reduced by using Pearl's device at room temperature under presεure of 3 kg/cm 2 . After 3 hours, the catalyst was filtered off and the solvent was 0 distilled off under reduced pressure. Then the residue was dissolved in 10 ml of chloroform and 0.1 ml of triethylamine was added thereto. To the resulting mixture was dropped 0.1 ml of 4-chlorobenzoyl chloride under ice-cooling. After stirring at room temperature for 2 hours, the mixture was 5 εucceεεively waεhed with 1 % hydrochloric acid and a εaturated aqueous solution of sodium chloride and dried over anhydrouε magnesium sulfate. After distilling off the solvent under reduced presεure, the residue was purified by preparative thin-layer chromatography (developer: chloroform 0 : methanol = 8 : 2). Thus 50 mg of the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) 6 ppm: 1.82, 1.92 (s, s, 6H), 5 2 - 93 ' 2.98 (dd, dd, 2H) , 4.23 (m, IH), 7.15 - 7.98 (m, 4H) , 7.53 - 7.64 (m, 4H), 10.24 (brs, IH) . EXAMPLE 33 Production of 2-iεopropylidenehydrazono-5-(N-phenylcarbamoyl- methyl)thiazolidin-4-one: By following the εimilar procedure to the above Example 9 but εubεtituting the ethyl 4-aminobenzoate with aniline, the above-mentioned target compound waε obtained. 10 NMR (DMS0-d 6 ) δ ppm: 1.93, 1.95 (2s, 6H), 2.87 (dd, IH, Jgem = 16.5 Hz, J = 9.57 Hz), 3.16 (dd, IH, J = 3.95 Hz) , 15 4.33 (dd, IH), 7.0 - 7.6 (m, 5H) , 10.11 (brs, IH), 11.70 (brs, IH). EXAMPLE 34 20 Production of 5-(N-isopropylcarbamoylmethyl)-2-iso- propylidenehydrazonothiazolidin-4-one: By following the similar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with ~ - isopropylamine, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.03, 1.05 (2s, 6H), 1.94 (s, 6H), 2.86 (dd, IH, Jgem = 16.2 Hz, J = 3.63 Hz), 3.15 (dd, IH), 3.81 (m, IH), 4.20 (dd, IH, J = 9.9 Hz) , 7.90 (d, IH), 11.64 (ε, IH). EXAMPLE 35 Production of 5-(N-benzylcarbamoylmethyl )-2-isopropylidene- hydrazonothiazolidin-4-one: By following the εimilar procedure to the above Example 9 but εubstituting the ethyl 4-aminobenzoate with benzylamine, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.94 1.95 (2s, 6H), 2.67 (dd, IH, Jgem = 16.2 Hz, J = 9.6 Hz), 2.97 (dd, IH, J = 4.0 Hz ) , 4.25 (m, 3H), 7.27 (m, 5H), 8.54 (t, IH, J = 5.9 Hz ) , 11.65 (brs, IH). EXAMPLE 36 Production of 5-[4-(4-chlorophenylthio)benzyl]-2-isopropyl- idenehydrazonothiazolidin-4-one: A mixture comprising 0.68 g of methyl 2-chloro-3-[4- (4-chlorophenylthio)phenyl] propionate, 0.32 g of acetone thiosemicarbazone, 0.20 g of εodium acetate and 20 ml of ethanol was refluxed under heating for 24 hours. After allowing to cool, the insoluble matters were filtered off and the solvent was distilled off under reduced presεure. The 0 residue was purified by εilica gel column chromatography (eluent: hexane : ethyl acetate = 2 : 1). Thuε 0.25 g of the above-mentioned target compound was obtained. NMR(CDC1 3 ) δ ppm: 1.99 (s, 3H), 5 2.07 (ε, 3H), 3.00 (dd, IH, J = 10.23, 14.19 Hz), 3.52 (dd, IH, J - 3.63, 14.19 Hz), 4.22 (dd, IH, J = 3.63, 10.23 Hz), 7.18 - 7.35 ( , 4H) . 0 EXAMPLE 37 Production of 2-isopropylidenehydrazono-5-[N-(2-methoxy- carbonyl-4-methylphenyl )carbamoylmethyl]thiazolidin-4-one: By following the εimilar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with c methyl 2-amino-5-methylbenzoate, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.93, 1.94 (2s, 6H), 2.31 (s, 3H), 2.96 (dd, IH, Jgem = 16.49 Hz, J = 9.24 Hz), 3.18 (dd, IH, J = 3.63 Hz), 3.83 (ε, 3H), 4.31 (dd, IH), 7.39 - 7.96 (m, 3H, phenyl), 10.44 (brε, IH), 11.70 (brs, IH). EXAMPLE 38 Production of 5-[N-(2-carboxy-4-methylphenyl )carbamoyl- methyl]-2-iεopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to the above Example 14 but uεing 2-isopropylidenehydrazono-5-[N-(2- methoxycarbonyl-4-methylphenyl)carbamoylmethyl]thiazolidin-4- one aε a starting material, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.93, 1.95 (2ε, 6H), 2.30 (s, 3H), 3.00 (dd, IH, Jgem = 16.49 Hz, J = 8.91 Hz), 3.19 (dd, IH, J = 3.96 Hz), 4.32 (dd, IH), 7 . 38 ( d , IH ) , 7 . 78 ( d , IH ) , 8 . 25 ( s , IH ) , 11.07 (brs, IH). EXAMPLE 39 Production of 5-(N-carboxymethylcarbamoylmethyl)-2-iso- propylidenehydrazonothiazolidin-4-one: By following the similar procedure to the above Example 14 but uεing 5-(N-ethoxycarbonylmethylcarbamoyl- methyl)-2-iεopropylidenehydrazonothiazolidin-4-one obtained in Example 13 aε a starting material, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.94 (ε, 6H), 2.61 (dd, 2H, Jgem = 9.90 Hz, J = 3.30 Hz)., 4.07 (dd, IH), 4.20, 4.25 (2dd, 2H), 8.24 (t, IH). EXAMPLE 40 Production of 2-iεopropylidenehydrazono-5-[N-(4-methyl- phenyl )carbamoylmethyl]thiazolidin-4-one: By following the similar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with p- toluidine, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.93, 1.94 (2s, 6H), 2.24 (s, 3H), 2.83 (dd, IH, Jgem = 16.49 Hz, J = 9.57 Hz), 3.13 (dd, IH, J = 3.63 Hz ) , 4.32 (dd, IH), 7.09, 7.44 (2d, 4H) , 10.00 (brs, IH), 10 11.67 (brs, IH). EXAMPLE 41 Production of 2-iεopropylidenehydrazono-5-[4-(3-pyridyl- methoxy)benzyl]thiazolidin-4-one: By following the εimilar procedure to the above i Example 26 but εubstituting the ethyl 3-(4-benzyloxyphenyl )- 2-chloropropionate with methyl 2-chloro-3-[4-(3-pyridyl- methyloxy)phenyl]propionate, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) 6 ppm: 20 !-91 (Sr 6H), 2.91 (dd, IH, J = 14.19 Hz, J = 9.57 Hz), 4.46 (dd, IH, J = 4.29 Hz, J = 9.24 Hz), 5.12 (ε, 2H), 6.97 (d, 2H, J = 8.58 Hz), 25 7.18 (d, 2H, J = 8.58 Hz), 7.40 - 7.45 (m, IH) , 7.84 - 7.89 ( , IH), 8.53 - 8.56 (m, IH), 8.66 (d, IH, J = 1.65 Hz), 11.68 (ε, IH). EXAMPLE 42 Production of 2-isopropylidenehydrazono-5-[4-(2-phenyl- ethoxy)benzyl]imidazolidin-4-one: By following the εimilar procedure to the above Example 1 but εubεtituting the O-benzyl-L-tyroεine methyl ester hydrochloride with O-2-phenethyltyrosine methyl ester, the above-mentioned target compound was obtained. NMR (CDC1 3 ) δ ppm: 1.93 (s, 3H), 2.01 (s, 3H), 2.72 (dd, IH, J = 8.91 Hz, J = 14.19 Hz), 3.05 (t, 2H, J = 6.93 Hz) , 3.16 (dd, IH, J = 3.63 Hz, J = 14.19 Hz), 4.10 (dd, IH, J = 7.26 Hz, J = 11.22 Hz), 4.11 (t, 2H, J = 6.93 Hz) , 6.81 (d, 2H, J = 8.58 Hz) , 7.10 (d, 2H, J = 8.58 Hz) , 7.18 - 7.32 (m, 5H) . EXAMPLE 43 Production of 5-(3-indolylmethyl)-2-isopropylidenehydrazono- imidazolidin-4-one: By following the similar procedure to the above Example 1 but substituting the O-benzyl-L-tyrosine methyl ester hydrochloride with L-tryptophane methyl ester hydrochloride, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.80 (s, 3H), 1.90 (ε, 3H), 3.00 - 3.16 (m, 2H) , 4.23 (t, IH, J = 4.29 Hz ) , 6.91 - 7.06 (m, 2H) , 7.11 (ε, IH), 7.31 (ε, IH), 7.29 (d, IH, J = 8.01 Hz ) , 7.56 (d, IH, J = 7.92 Hz ) , 10.48 (brε, IH), 10.82 (brs, IH) . EXAMPLE 44 Production of 2-isopropylidenehydrazono-5-[4-(2-thienyl- methoxy)benzyl]imidazolidin-4-one: By following the εimilar procedure to the above Example 1 but subεtituting the O-benzyl-L-tyroεine methyl ester hydrochloride with 0-2-thienylmethyl-L-tyrosine ethyl ester, the above-mentioned target compound was obtained. NMR (DMS0-d 6 ) 8 ppm: 1.82, 1.92 (2s, 6H), 2.85 (dd, IH, Jgem = 13.86 Hz, J = 4.62 Hz), 2.95 (dd, IH, J = 4.95 Hz) , 4.19 (t, IH), 5.22 (s, 2H), 6.87 - 7.55 (m, 7H) , 7.54 (d, IH), 10.52 (brs, IH) . EXAMPLE 45 Production of 5-(5-hydroxy-3-indolylmethyl)-2-isopropylidene- hydrazonoimidazolidin-4-one: By following the εimilar procedure to the above Example 1 but εubεtituting the O-benzyl-L-tyrosine methyl ester hydrochloride with DL-5-hydroxytryptophane methyl ester hydrochloride, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.82 (s, 3H), 1.91 (s, 3H), 2.93 (dd, IH, J = 5.27 Hz, 14.84 Hz), 3.04 (dd, IH, J = 4.62 Hz, 14.85 Hz), 4.19 (t, IH, J = 4.95 Hz) , 6.57 (dd, IH, J = 2.31 Hz, 8.58 Hz), 6.86 (d, IH, J = 1.98 Hz) , 7.02 (d, IH, J = 2.31 Hz) , 7.27 (s, IH), 8.58 (brε, IH), 10.51 (brs, IH). EXAMPLE 46 Production of 5-(3,4-dihydroxybenzyl)-2-isopropylidene- hydrazonoimidazolidin-4-one: By following the similar procedure to the above Example 1 but subεtituting the O-benzyl-L-tyrosine methyl eεter hydrochloride with DL-3-(3,4-dihydroxyphenyl )alanine ethyl eεter hydrochloride, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.83 (ε, 3H), 1.91 (ε, 3H), 2.71 (dd, IH, J = 4.95 Hz, 13.86 Hz), 2.83 (dd, IH, J = 4.95 Hz, 13.85 Hz), 4.12 (t, IH, J = 4.29 Hz) , 6.44 (dd, IH, J = 1.98 Hz, 7.92 Hz), 6.57 - 6.59 ( , 2H), 7.24 (brs, IH), 7.47 (brs, IH) . EXAMPLE 47 Production of 5-[ -(3,4-difluorophenyl)carbamo lmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to the above Example 9 but subεtituting the ethyl 4-aminobenzoate with 3,4-difluoroaniline, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.94, 0 1.95 (2ε, 6H), 2.89 (dd, IH, Jgem = 16.50 Hz, J = 9.24 Hz), 3.15 (dd, IH, J = 3.96 Hz ) , 4.33 (dd, IH), 7.23 - 7.79 (m, 3H), 5 10.37 (brs, IH), 11.72 (brs, IH). EXAMPLE 48 Production of 5-[N-(4-benzyloxyphenyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one: o By following the εimilar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with 4- benzyloxyaniline, the above-mentioned target compound was obtained. NMR (DMSO-d 5 ) δ ppm: 5 2.08, 2.09 (2s, 6H), 2.97 (dd, IH, Jgem = 16.50 Hz, J = 9.57 Hz), 3.27 (dd, IH, J = 3.96 Hz) , 4.46 (dd, IH), 5.21 (s, 2H), 7.09 - 7.63 (m, 9H), 10.12 (brs, IH), 11.82 (brs, IH) . EXAMPLE 49 Production of 5-[N-(4-chlorophenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to the above Example 9 but εubεtituting the ethyl 4-aminobenzoate with 4- chloroaniline, the above-mentioned target compound was obtained. NMR (DMS0-d 6 ) δ ppm: 1.93, 1.94 (2s, 6H), 2.87 (dd, IH, Jgem = 16.50 Hz, J = 9.57 Hz), 3.15 (dd, IH, J = 3.95 Hz ) , -3 (dd, IH), 7.36, 7.58 (2d, 4H), 10.25 (brs, IH), 11.69 (brs, IH). EXAMPLE 50 Production of 2-iεopropylidenehydrazono-5-[N-(4-methoxy- phenyl)carbamoylmethyl]thiazolidin-4-one: By following the εimilar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with p- aniεidine, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) 8 ppm: 1.93 1.94 (2s, 6H), 2.82 (dd, IH, Jgem = 16.16 Hz, J - 9.57 Hz), 10 3.11 (dd, IH, J = 3.96 Hz) , 3.72 (s, 3H), 4.31 (dd, IH), 6.87, _ c 7.86 (2d, 4H), ID 9.97 (brε, IH), 11.69 (brs, IH). EXAMPLE 51 Production of 2-iεopropylidenehydrazono-5-[N-( -methylthio- phenyl)carbamoylmethyl]thiazolidin-4-one: By following the εimilar procedure to the above Example 9 but εubεtituting the ethyl 4-aminobenzoate with 4- methylthioaniline, the above-mentioned target compound waε obtained. - NMR (DMSO-d 6 ) δ ppm: 1.93, 1.95 (2s, 6H), 2.44 (s, 3H), 2.85 (dd, IH, Jgem = 16.49 Hz, J = 9.24 Hz), 3.14 (dd, IH, J = 3.95 Hz ) , 4.31 (dd, IH), 7.22 (d, 2H), 7.52 (d, 2H), 10.11 (brs, IH), 11.68 (brs, IH) . EXAMPLE 52 Production of 5-[ -(4-bromophenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to the above Example 9 but subεtituting the ethyl 4-aminobenzoate with 4- bromoaniline, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.93, 1.94 (2ε, 6H), 2.87 (dd, IH, Jgem = 16.50 Hz, J = 9.24 Hz), 3.15 (dd, IH, J = 3.95 Hz ) , 4.33 (m, IH), 7.46 - 7.56 (m, 4H) , 10.25 (brs, IH), 11.69 (brs, IH). EXAMPLE 53 Production of 2-isopropylidenehydrazono-5-[N-( 3,4 , 5- trichloro-phenyl)carbamoylmethyl]thiazolidin-4-one: By following the similar procedure to the above Example 9 but subεtituting the ethyl 4-aminobenzoate with 3,4 ,5-trichloroaniline, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.94, 0 1.95 (2s, 6H), 2.94 (dd, IH, Jgem ■ = 16.83 Hz, J = 8.90 Hz), 3.16 (dd, IH, J = 3.96 Hz) , 4.33 (dd, IH), 7.82 (s, 2H), 5 10.54 (brs, IH), 11.71 (brs, IH). EXAMPLE 54 Production of 2-isopropylidenehydrazono-5-[N-( 3,4- methylenedioxyphenyl)carbamoylmethyl]thiazolidin-4-one: Q By following the similar procedure to the above Example 9 but subεtituting the ethyl 4-aminobenzoate with 3,4-methylenedioxyaniline, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 5 1-94, 1.95 (2s, 6H), 2.83 (dd, IH, Jgem = 16.33 Hz, J = 9.40 Hz), 3.12 (dd, IH, J = 3.80 Hz ) , 4.31 (dd, IH), 5.97 (ε, 2H), 6.82 - 6.97 (m, 3H) , 7.28 (s, IH), 10.17 (s, IH). EXAMPLE 55 Production of 2-isopropylidenehydrazono-5-[N-(1-naphthyl)- carbamoylmethyl]thiazolidin-4-one: By following the εimilar procedure to the above Example 9 but εubstituting the ethyl 4-aminobenzoate with 1- naphthylamine, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.95 (s, 6H), 3.03 (dd, IH, Jgem = 16.17 Hz, J = 9.57 Hz), 4.39 (dd, IH, J = 3.63 Hz ) , 7.46 - 8.12 (m, 7H), 10.10 (brs, IH), 11.71 (brs, IH). EXAMPLE 56 Production of 5-[N-(3 ,5-dichlorophenyl )carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to the above Example 9 but subεtituting the ethyl 4-aminobenzoate with 3,5-dichloroaniline, the above-mentioned target compound was obtained. NMR (DMS0-d 6 ) δ ppm: 1.94, 1.95 (2s, 6H), 2.92 (dd, IH, Jgem = 16.82 Hz, J = 8.91 Hz), 3.16 (dd, IH, J = 3.96 Hz) , 4.33 (dd, IH), 7.28 (t, IH), 10 7.61 (s, IH), 7.62 (s, IH), 10.47 (s, IH), 11.72 (brs, IH). EXAMPLE 57 ,c Production of 2-iεopropylidenehydrazono-5-(N-methyl-N-phenyl- carbamoylmethyl)thiazolidin-4-one: By following the similar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with N- methylaniline, the above-mentioned target compound was 0 obtained. NMR (CDC1 6 ) δ ppm: 1.98, 2.02 (2s, 6H), 2.55 (dd, IH, Jgem - 17.16 Hz, J = 10.56 Hz), 5 2.99 (dd, IH, J = 3.30 Hz ) , 3.29 (s, 3H), 4.29 (dd, IH), 7.16 - 7.45 (m, 5H) . EXAMPLE 58 Production of 2-isopropylidenehydrazono-5-[N-( 3-pyridyl- methyl)carbamoylmethyl]thiazolidin-4-one: By following the similar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with 3- aminomethylpyridine, the above-mentioned target compound was obtained. NMR (DMS0-d 6 ) δ ppm: 1.94 (2s, 6H), 2.68 (dd, IH, Jgem = 16.17 Hz, J = 9.57 Hz), 2.98 (dd, IH, J = 3.96 Hz) , 4.26 (dd, IH), 4.31 (d, 2H, J = 5.94 Hz) , 7.32 - 8.48 (m, 4H) , 8.61 (t, IH), 11.66 (brs, IH). EXAMPLE 59 Production of 2-isopropylidenehydrazono-5-[N-( 3-imidazol-l- yl)propylcarbamoylmethyl]thiazolidin-4-one: By following the similar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with 1- (3-aminopropyl )imidazole, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.76 - 1.99 (m, 8H) , 2.60 (dd, IH, J = 9.57 Hz, J = 14.84 Hz), 2.90 (dd, IH, J = 3.96 Hz, J = 15.84 Hz), 3.00 - 3.48 (m, 2H), 3.96 (t, 2H, J = 6.93 Hz ) , 4.24 (dd, IH, J = 3.96 Hz, J = 9.24 Hz), 6.88 (s, IH), 7.16 (s, IH), 7.61 (s, IH), 8.10 (t, IH, J = 5.28 Hz) , 11.65 (brs, IH) . EXAMPLE 60 Production of 2-isopropylidenehydrazono-5-(N-morpholino- carbamoylmethyl )thiazolidin-4-one: By following the similar procedure to the above Example 9 but subεtituting the ethyl 4-aminobenzoate with N- aminomorpholine, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.93, 1.94 (2s, 6H), 2.72 ( , 4H), 2.82 ( , IH), 2.85 (m, IH), 3.60 (m, 4H), 4.19 (m, IH), 8.77, 9.10 (2s, IH), 11.64 (brs, IH) . EXAMPLE 61 Production of 2-isopropylidenehydrazono-5-[N-(2-thienyl- methyl)carbamoylmethyl]thiazolidin-4-one: By following the similar procedure to the above Example 9 but subεtituting the ethyl 4-aminobenzoate with 2- thienylmethylamine, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.94 (2s, 6H), 2.62 (dd, IH, Jgem = 16.16 Hz, J = 9.90 Hz), 2.94 (dd, IH, J = 3.63 Hz) , 4.24 (dd, IH), 4.43 ( , 2H), 6.93 - 7.40 (m, 3H) , 8.64 (t, IH), 11.64 (brs, IH) . EXAMPLE 62 Production of 2-isopropylidenehydrazono-5-[N-(4-morpholino- phenyl)carbamoylmethyl]thiazolidin-4-one: By following the εimilar procedure to the above Example 9 but εubstituting the ethyl 4-aminobenzoate with 4- morpholinoaniline, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) 8 ppm: 1.93, 1.94 (2s, 6H), 2.81 (dd, IH, Jgem = 16.16 Hz, J = 9.57 Hz), 3.03 (m, 4H), 3.11 (dd, IH, J = 3.63 Hz ) , 3.72 (m, 4H), 4.30 (dd, IH), 6.88, 7.42 (2d, 4H, phenyl), 9.90 (s, IH), 11.67 (brε, IH) . ' EXAMPLE 63 Production of 2-isopropylidenehydrazino-4-(3-pyridyl )thiazole: By following the εimilar procedure to the above Example 17 but substituting the chloroacetone with 3- bromoacetylpyridine, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) 8 ppm: 1.94, 1.96 (2s, 6H), 7.40 - 9.03 ( , 4H, pyridyl) , 10.74 (brs, IH). EXAMPLE 64 Production of 4-(4-carboxyphenyl)-2-isopropylidenehydrazino- thiazole: By following the εimilar procedure to the above Example 17 but substituting the chloroacetone with 4- bromoacetylbenzoic acid, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.94, 1.96 (2s, 6H), 7.43 (s, IH), 7.96 (d, 4H, phenyl) . EXAMPLE 65 Production of 2-isopropylidenehydrazono-5-[N-( 1-phenylethyl)- carbamoylmethyl]thiazolidin-4-one: By following the εimilar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with - methylbenzylamine, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.32, 1.35 (2s, 3H), 1.93, 1.94 (2s, 6H), 2.56 - 2.68 (m, IH) , 2.92 - 3.00 (m, IH) , 4.18 - 4.22 (m, IH) , 4.88 - 4.93 (m, IH), 7.20 - 7.31 (m, 5H, phenyl), 8.46 - 8.49 (m, IH), 11.62 (brε, IH) . EXAMPLE 66 Production of 5-(4-benzyloxybenzyl)-2-hydrazonoimidazolidin- 4-one: To 5.3 g of 5-(4-benzyloxybenzyl)-2-iεopropylidene- hydrazonoimidazolidin-4-one produced in the above Example 1 waε added 54 ml of 0.5 N hydrochloric acid and the obtained mixture waε steam-distilled for 15 minutes . Then the reaction mixture was cooled and the white crystalε thus precipitated were recovered by filtration. Thus 4.6 g of the above-mentioned target compound was obtained. NMR (DMS0-d 6 ) 8 ppm: 2.92 - 3.07 (m, 2H), 4.51 - 4.60 (brt, IH) , 5.05 (ε, 2H), 6.92 (d, 2H, J = 8.57 Hz ) , 7.10 - 7.17 (m, 2H) , 7.29 - 7.47 (m, 5H) , 9.66 (brε, IH) . EXAMPLE 67 Production of 2-hydrazono-5-(N-phenylcarbamoylmethyl)- thiazolidin-4-one: By following the similar procedure to the above Example 66 but using 2-isopropylidenehydrazono-5-(N- phenylcarbamoyl)thiazolidin-4-one produced in the above Example 33 aε a εtarting material, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 2.84 - 2.94 (m, IH), 3.14 - 3.30 (m, IH), 4.36 - 4.42 (m, IH) , 7.05 (t, IH, J = 7.25 Hz), 7.30 (t, 2H, J = 7.92 Hz), 7.55 (d, 2H, J = 8.25 Hz) , 10.13 (ε, IH), 11.77 (d, IH, J = 13.85 Hz) . EXAMPLE 68 Production of 2-isopropylidenehydrazono-5-[N-(2-methyl-5- methoxycarbonylphenyl)carbamoylmethyl]thiazolidin-4-one: By following the εimilar procedure to the above Example 9 but εubεtituting the ethyl 4-aminobenzoate with methyl 3-amino-4-methylbenzoate, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.95 (s, 6H), 2.28 (s, 3H), 2.92 (dd, IH, Jgem = 16.49 Hz, J = 9.24 hz), 3.25 (dd, IH, J = 3.96 Hz), 3.84 (s, 3H), 4.34 (dd, IH), 7.35 - 8.09 (m, 3H, phenyl), 9.60 (brs, IH), 11.70 (brs, IH). EXAMPLE 69 Production of 2-isopropylidenehydrazino-4-trifluoromethyl- thiazole: By following the εimilar procedure to the above Example 17 but εubstituting the chloroacetone with 1-bromo- 3,3, 3-trifluoroacetone, the above-mentioned target compound was obtained. NMR (CDC1 3 ) δ ppm: 1.87 (s, 3H), 2.05 (ε, 3H), 7.07 (t, IH), 8.54 (brε, IH) . EXAMPLE 70 Production of 4-ethoxycarbonylmethyl-2-iεopropylidene- hydrazinothiazole: By following the εimilar procedure to the above Example 17 but εubstituting the chloroacetone with ethyl 4- chloroacetoacetate, the above-mentioned target compound was obtained. NMR (CDCI 3 ) δ ppm: 1.26 (t, 3H), 1.86 (s, 3H), 2.04 (ε, 3H), 3.59 (2s, 2H), 4.18 (q, 2H) 6.45 (s, IH). 10 EXAMPLE 71 Production of 4-carboxymethyl-2-isopropylidenehydrazino- thiazole: By following the similar procedure to the above Example 14 but using 4-ethoxycarbonylmethyl-2-isopropylidene- ,5 hydrazinothiazole produced in the above Example 70 aε a εtarting material, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.88 (ε, 3H), 20 1 -92 (s, 3H), 3,46 (ε, 2H), 6.49 (s, IH), 11.34 (brε, IH). 5 EXAMPLE 72 Production of 2-cyclopentylidenehydrazono-5-(4-benzyloxy- benzyl)imidazolidin-4-one: 100 Milligrams of 5-(4-benzyloxybenzyl)-2-hydrazono- imidazolidin-4-one hydrochloride produced in the above Example 66 was disεolved in 10 ml of methanol and 82 mg of cyclopentanone waε added thereto. After εtirring at room temperature for 1 hour, the reaction mixture waε concentrated under reduced preεεure and the reεidue waε purified by εilica gel column chromatography (eluent: chloroform : methanol = 60 : 1). Thuε 87 mg of the above-mentioned target compound was obtained as white cryεtals . NMR (DMSO-d 6 ) 6 ppm: 1.65 - 1.68 (m, 4H), 2.26 - 2.32 (m, 4H), 2.85 (dd, IH, J = 4.29 Hz, J = 13.86 Hz), 2.94 (dd, IH, J = 4.94 Hz, J = 14.18 Hz), 4.17 (brt, IH), 5.03 (ε, 2H), 6.88 (d, 2H, J = 8.25 Hz), 7.10 (d, 2H, J = 8.58 Hz) , 7.29 - 7.45 (m, 5H) , 7.60 (brε, IH) , 10.55 (brε, IH) . EXAMPLE 73 Production of 2-dicylopropylmethylenehydrazono-5-(N-phenyl- carbamoylmethyl)thiazolidin-4-one: By following the εimilar procedure to the above Example 72 but uεing 2-hydrazono-5-(N-phenylcarbamoylmethyl)- thiazolidin-4-one hydrochloride produced in the above Example 67 aε a starting material, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 0.61 - 1.09 (m, 10H), 2.86 (dd, IH, J = 9.90 Hz, J = 16.83 Hz), 3.17 (dd, IH, J = 3.63 Hz, J = 16.50 Hz), 4.29 (dd, IH, J = 3.63 Hz, J = 9.57 Hz), 7.05 (t, IH, J = 7.26 Hz) , 7.30 (t, 2H, J = 7.59 Hz), 7.56 (d, 2H, J = 7.59 Hz ) , 10.10 (s, IH), 11.67 (brε, IH) . EXAMPLE 74 Production of 2-cyclohexylmethylenehydrazono-5-( -phenyl- carbamoylmethyl)thiazolidin-4-one: By following the εimilar procedure to the above Example 72 but uεing 2-hydrazono-5-(N-phenylcarbamoylmethyl)- thiazolidin-4-one hydrochloride produced in the above Example 67 and cyclohexane carboxaldehyde as starting materials, the above-mentioned target compound waε obtained. - Ill NMR (DMSO-d 6 ) δ ppm: 1.07 - 1.76 (m, 10H), 2.18 - 2.26 ( , IH), 2.85 (dd, IH, J = 9.90, 16.83 Hz), 3.17 (dd, IH, J = 3.30 Hz, J = 16.17 Hz), 4.34 (dd, IH, J ■ = 3.30 Hz, J = 9.23 Hz), 7.00 - 7.61 (m, 6H) , 10.11 (s, IH), 11.78 (brs, IH) . EXAMPLE 75 0 Production of 5-(4-benzyloxycarbonylaminobutyl)-2- isopropylidenehydrazonoimidazolidin-4-one (compound A) and 2- iεopropylidenehydrazono-5-(4-methoxycarbonylaminobutyl)- imidazolidin-4-one (compound B): By following the εimilar procedure to the above 5 Example 1 but εubεtituting the O-benzyl-L-tyroεine methyl eεter hydrochloride with N e -benzyloxycarbonyl-L-lyεine methyl ester hydrochloride, the above-mentioned target compounds were obtained. - . Compound A: Rf value: 0.54 (dichloromethane : methanol = 9 : 1). NMR (DMSO-d 6 ) δ ppm: 1.25 - 1.71 (m, 6H), 1.88 (s, 3H), 5 1.93 (s, 3H), 2.94 - 2.99 (m, 2H), 3.89 (t, IH, J = 4.95 Hz), 5.00 (ε, 2H), 7.22 (m, 6H), 7.47 (ε, IH), 10.67 (brε, IH) . Compound B: Rf valueε: 0.48 (dichloromethane : methanol = 9 : 1) NMR (DMSO-d 6 ) δ ppm: 1.25 - 1.70 (m, 6H), 1-87 (ε, 3H), 1.93 (s, 3H), 2.91 - 2.95 (m, 2H), 3.50 (s, IH), 3.89 (t, IH, J = 4.95 Hz) , 7.08 (brs, IH), 7.45 (brs, IH) , 10.67 (brε, IH) . EXAMPLE 76 Production of 2-isopropylidenehydrazono-5-(2-methylpropyl)- imidazolidin-4-one: By following the εimilar procedure to the above Example 1 but εubεtituting the O-benzyl-L-tyroεine methyl eεter hydrochloride with L-leucine methyl eεter hydrochloride, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 0.87 (s, 3H), 0.89 (s, 3H), 1.86 - 1.94 (m, IH) , 1.88 (s, 3H), 1.93 (ε, 3H), 3.88 (t, IH, J = 4.61 Hz) , 7.52 (s, IH), 10.63 (brε, IH) . EXAMPLE 77 Production of 5-isopropyl-2-iεopropylidenehydrazono- imidazolidin-4-one: By following the similar procedure to the above Example 1 but substituting the O-benzyl-L-tyrosine methyl ester hydrochloride with L-valine methyl ester hydrochloride, the above-mentioned target compound was obtained. NMR (DMS0-d 6 ) δ ppm: 0.83 (d, 3H, J = 6.59 Hz) , 0.93 (d, 3H, J = 6.93 Hz ) , 1.89 - 2.06 (m, IH), 1.88 (s, 3H), 1.94 (s, 3H), 3.81 (d, IH, J = 2.97 Hz) , 7.41 (brs, IH), 10.80 (brs, IH). EXAMPLE 78 Production of 2-isopropylidenehydrazono-5-[ 2-( -phenyl- carbamoyl)ethyl]imidazolidin-4-one: (Step I) c 10 Grams of -methyl N α -tert-butyloxycarbonyl-L- glutamate [Muraki and Mizoguchi, Chem. Pharm. Bull., 19. 1 1708 (1971)], 4.28 g of aniline and 6.21 g of N-hydroxybenz- triazole were dissolved in 50 ml of dimethylformamide. Under ice-cooling, water-soluble carbodiimide waε added thereto and 0 the obtained mixture waε stirred at room temperature for 18 hourε . The reaction mixture waε poured into a mixture of ethyl acetate with water (each 250 ml portion) and diεtribute between aqueous and organic layers . The organic layer was successively washed with 1 % hydrochloric acid, a saturated aqueous solution of sodium hydrogencarbonate and a saturated aqueous solution of sodium chloride and dried over anhydrous sodium sulfate. After distilling off the solvent under reduced pressure, the residual εolid waε recrystallized from a mixture of ethyl acetate with n-hexane. Thus 1.48 g of NX- tert-butyloxycarbonyl-L- -phenyl)glutamine methyl ester was obtained. NMR (CDC1 3 ) δ ppm: 1.46 (s, 9H), 1.94 (m, IH), 2.32 (m, IH) , 2.46 (m, 2H), 3.74 (ε, 3H), 4.38 (m, IH), 5.36 (brs, IH), 7.07 - 7.60 (m, 5H), 8.52 (brs, IH) . (Step II) 11.42 Grams of the compound produced in the above Step I was added to 35 ml of a 4.5 N solution of hydrogen chloride in ethyl acetate and stirred at room temperature for 20 minutes. The reaction mixture was concentrated under reduced pressure and thus 8.9 g of L- -phenyl)glutamine methyl ester hydrochloride was obtained. NMR (DMSO-d 6 ) δ ppm: 2.13 (m, 2H), 2.59 (m, 2H), 3.74 (s, 3H), 4.06 (m, IH), 7.00 - 7.62 (m, 5H) , 8.63 (brs, 3H). (Step III) By following the similar procedure to the above Example 1 but using the L-(^-phenyl)glutamine methyl ester hydrochloride obtained in the above Step II as a starting material, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) 8 ppm: 1.88 (s, 3H), 1.93 (ε, 3H), 1.87 - 2.06 ( , 2H) , 2.26 - 2.48 (m, 2H) , 4.09 (dd, IH, J = 5.28 Hz, J = 10.56 Hz), 7.01 (t, IH, J = 7.26 Hz) , 7.27 (t, 2H, J = 7.59 Hz), 7.59 (d, 2H, J = 7.59 Hz) , 9.92 (s, IH), 10.77 (brs, IH) . EXAMPLE 79 Production of 5-benzyloxycarbonylmethyl-2-isopropylidene- hydrazonoimidazolidin-4-one (compound C) and 2-iso- propylidenehydrazono-5-methoxycarbonylmethylimidazolidin-4- one (compound D) : By following the εimilar procedure to the above Example 1 but substituting the O-benzyl-L-tyrosine methyl ester hydrochloride with α-methyl L-aεpartate hydrochloride and β-benzyl L-aspartate hydrochloride, the above-mentioned target compounds were obtained. Compound C: Rf value: 0.60 (dichloromethane : methanol = 9 : 1). NMR (DMSO-d 6 ) δ ppm: 1.88 (s, 3H), 1.93 (s, 3H), 2.76 (d, 2H, J = 5.61 Hz) , 4.19 (t, IH, J = 5.28 Hz ) , 5 . 09 ( ε , 2H ) , 7 . 31 - 7 . 41 (m , 6H ) , 10.65 (brs, IH). Compound D: Rf value: 0.51 (dichloromethane : methanol = 9 : 1). NMR (CDC1 3 ) δ ppm: 2.02 (ε, 3H), 2.12 (s, 3H), 2.54 (dd, 2H, J = 10.56 Hz, J = 17.49 Hz), 3.03 (dd, IH, J = 2.97 Hz, J = 17.49 Hz), 3.74 (ε, 3H), 4.28 (dd, IH, J = 2.64 Hz, J = 10.56 Hz). EXAMPLE 80 Production of 5-carboxymethyl-2-isopropylidenehydrazono- imidazolidin-4-one: By following the εimilar procedure to the above Example 14 but uεing 2-iεopropylidenehydrazono-5-methoxy- carbonylmethylimidazolidin-4-one produced in the above Example 79 aε a starting material, the above-mentioned target compound was obtained. NMR (DMS0-d 6 ) δ ppm: 1.88 (s, 3H), 1.92 (s, 3H), 2.61 (dd, 2H, J = 0.99 Hz, J = 4.95 Hz), 4.13 (t, IH, J - 5.28 Hz) , 7.29 (brs, IH), 11.55 (brε, IH). EXAMPLE 81 Production of 2-iεopropylidenehydrazono-5-(N-phenylcarbamoyl- methyl)imidazolidin-4-one: By following the similar procedure to the above Example 9 but using 5-carboxymethyl-2-isopropylidene- hydrazonoimidazolidin-4-one produced in the above Example 80 and aniline aε εtarting materials, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.88 (ε, 3H), 1.91 (ε, 3H), 2.63 (dd, 2H, J = 6.92, 15.50 Hz), 2.81 (dd, IH, J = 4.95, 15.83 Hz), 4.24 (t, IH, J = 5.28 Hz) , 7.03 (t, 2H, J = 7.26 Hz) , 7.29 (t, 2H, J = 7.59 Hz) , 7.58 (d, 2H, J = 7.59 Hz) , 10.01 (s, IH), 10.74 (brs, IH). EXAMPLE 82 Production of 5-(N-cyclopropylcarbamoylmethyl )-2-isopropyl- idenehydrazonoimidazolidin-4-one: By following the εimilar procedure to the above Example 9 but uεing 5-carboxymethyl-2-iεopropylidene- hydrazonoimidazolidin-4-one produced in the above Example 80 and cyclopropylamine aε εtarting materialε, the above- mentioned target compound waε obtained. NMR (DMSO-d 6 ) 6 ppm: 0.50 - 0.82 (m, 4H), 2.01 (ε, 3H), 2.07 (s, 3H), 2.37 (dd, IH, J = 10.23 Hz, J = 15.51 Hz), 2.59 - 2.73 (m, IH), 2.91 (dd, IH, J = 2.97 Hz, J = 15.84 Hz), 4.29 (dd, IH, J = 2.97 Hz, J = 9.90 Hz). EXAMPLE 83 Production of 5-(4-benzyloxybenzyl)-2-(4-bromobenzeneεulfono- hydrazonoimidazolidin-4-one: 173 Milligramε of 5-(4-benzyloxybenzyl )-2-hydrazono- imidazolidin-4-one hydrochloride produced in the above Example 66 was dissolved in a εolvent mixture comprising 10 ml of tetrahydrofuran with 5 ml of water. Under ice-cooling, 42 mg of sodium hydrogencarbonate and 180 mg of 4-bromo- benzenesulfonyl chloride were successively added thereto and the obtained mixture was εtirred at the εame temperature for 30 minuteε and then at room temperature for 1 hour. The reaction mixture was concentrated under reduced presεure and the reεidue waε distributed between aqueous and organic layers by adding water and dichloromethane thereto. The organic layer was dried over anhydrous magnesium sulfate and concentrated again under reduced presεure. The reεidue waε charged on εilica gel column chromatography and eluted with a solvent mixture of chloroform and methanol (50 : 1 (v/v)). Thuε 82 mg of the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 2.87 (dd, IH, J = 4.61 Hz, J = 14.18 Hz), 2.93 (dd, IH, J = 4.95 Hz, J = 14.19 Hz), 4.06 (brt, IH), 5.05 (ε, 2H), 5.91 (ε, IH), 6.80 (d, 2H, J = 8.58 Hz ) , 6.99 (d, 2H, J = 8.25 Hz), 7.33 - 7.49 (m, 5H), 7.74 - 7.85 (m, 4H), 8.93 (ε, IH). EXAMPLE 84 Production of 2-(4-acetoamidobenzeneεulfonohydrazono)-5-(4- benzyloxybenzyl)imidazolidin-4-one: By following the similar procedure to the above Example 83 but subεtituting the 4-bromobenzenesulfonyl chloride with 4-acetoamidobenzenesulfonyl chloride, the above-mentioned target compound was obtained. NMR (DMS0-d 6 ) 6 ppm: 2.05 (s, 3H), 2.78 (dd, IH, J = 4.94 Hz, J = 14.18 Hz), 2.93 (dd, IH, J = 4.94 Hz, J = 14.18 Hz), 4.05 (t, IH, J = 4.95 Hz) , 5.02 (s, 2H), 5.76 (ε, IH), 6.81 (d, 2H, J = 8.58 Hz) , 7.02 (d, 2H, J = 8.58 Hz) , 7.31 - 7.45 (m, 5H), 7.73 (d, 2H, J = 9.24 Hz) , 7.86 (d, 2H, J = 8.91 Hz) , 8.78 (s, IH), 10.39 (s, IH). EXAMPLE 85 Production of 2-isopropylidenehydrazono-5-[N-(1-phenylethyl)• carbamoylmethyl]imidazolidin-4-one: By following the similar procedure to the above Example 9 but using 5-carboxymethyl-2-isopropylidene- hydrazonoimidazolidin-4-one produced in the above Example 80 and α-methylbenzylamine as starting materials, the above- mentioned target compound waε obtained. NMR (DMS0-d 6 ) δ ppm: 1-34 (d, 3H, J = 6.93 Hz) , 1.88 (ε, 3H), 1.91 (ε, 3H), 2.36 - 2.49 (m, IH), 2.51 - 2.68 (m, IH), 4.15 (brt, IH), 4.88 - 4.91 (m, IH) , 7.08 (d, IH, J = 27.71 Hz), 7.18 - 7.31 ( , 5H) , 8.38 (d, IH, J = 7.59 Hz) , 10.73 (brs, IH) . EXAMPLE 86 Production of 5-(4-imidazolylmethyl)-2-isopropylidene- hydrazonoimidazolidin-4-one: By following the similar procedure to the above Example 1 but substituting the O-benzyl-L-tyrosine methyl ester hydrochloride with L-histidine methyl ester dihydrochloride, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.87 s, 3H), 1.92 s, 3H), 2.75 dd, IH, J 6.93 Hz, J 14.85 Hz) , 2.97 dd, IH, J 4.29 Hz, J 14.84 Hz) , 4.14 dd, IH, J 4.62 Hz, J 6.93 Hz) , 6.80 s, IH), 7.26 s, IH), 7.54 ε, IH), 10.70 (brs, IH) EXAMPLE 87 Production of 2-isopropylidenehydrazono-5-[N-(2-methoxy- carbonylphenyl)carbamoylmethyl]thiazolidin-4-one: By following the similar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with methyl 2-aminobenzoate, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.93 (s, 3H), 1-94 (s, 3H), 2.99 (dd, IH, Jgem = 16.49 Hz, J = 9.24 Hz), 3.17 (dd, IH, J = 3.62 Hz) , 3.84 (ε, 3H), 4.32 (dd, IH), 7.19 - 8.09 (m, 4H, phenyl), 10.56 (brs, IH), 11.71 (brs, IH). EXAMPLE 88 Production of 5-[N-(2-carboxyphenyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to the above Example 14 but using 2-isopropylidenehydrazono-5-[N-(2- methoxycarbonylphenyl)carbamoylmethyl]thiazolidin-4-one produced in the above Example 87 aε a starting material, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.94 (ε, 3H), 1.95 (ε, 3H), 3.04 (dd, IH, Jgem = 16.67 Hz, J = 8.91 Hz), 3.22 (dd, IH, J = 3.96 Hz), 4.34 (dd, IH), 7.14 - 8.39 (m, 4H, phenyl), 11.14 (brε, IH) , 11.90 (brε, IH) . EXAMPLE 89 Production of 5-[N-(5-carboxy-2-methylphenyl)carbamoyl- methyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to the above Example 14 but using 2-isopropylidenehydrazono-5-[N-(5- methoxycarbonyl-2-methylphenyl)carbamoylmethyl]thiazolidin-4- one produced in the above Example 68 aε a εtarting material, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) 8 ppm: 1.95 (ε, 6H), 2.27 ( s ' 3H), 2.91 (dd, IH, Jgem = 16.50 Hz, J -= 9.57 Hz), 3.24 (dd, IH, J = 3.63 Hz) , 4.34 (dd, IH), 7.32 - 8.09 (m, 3H) , 9.59 (brs, IH), 12.00 (brε, IH). EXAMPLE 90 Production of 5-[N-(3,4-dimethoxyphenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to the above Example 9 but subεtituting the ethyl 4-aminobenzoate with 3,4-dimethoxyaniline, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) 8 ppm: 1.94 (ε, 3H), 1.95 (ε, 3H), 2.83 (dd, IH, Jgem = 16.49 Hz, J = 9.57 Hz), 3.12 (dd, IH, J = 3.96 Hz) , 3.71 (ε, 3H), 3.72 (s, 3H), 4.31 (dd, IH), 6.86 - 7.29 ( , 3H) , 9.98 (brε, IH), 11.69 (brε, IH) . EXAMPLE 91 Production of 3-ethoxycarbonylmethyl-5-(N-phenylcarbamoyl- methyl)-2-iεopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to the above Example 9 but using the compound obtained in the above Example 15 and aniline, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.20 (t, 3H), 1.92 (s, 3H), 1.95 (s, 3H), 2.87 (dd, IH, J = 9.90 Hz), 4.15 (q, 2H), 4.46 (d, 2H, J = 2.97 Hz) , 4.54 (dd, IH, J ■ = 3.63 Hz ) , 7.03 - 7.57 (m, 5H, phenyl), 10.16 (brs, IH). EXAMPLE 92 Production of 2-isopropylidenehydrazino-4-(3-thienyl)thiazole: By following the similar procedure to the above Example 17 but substituting the chloroacetone with 3- bromoacetylthiophene, the above-mentioned target compound was obtained. NMR (CDC1 3 ) δ ppm: 1.85 (s, 3H), 2.04 (ε, 3H), 6.72 (ε, IH), 7.00 - 7.33 (m, 3H, thienyl) , 8.66 (brs, IH) . EXAMPLE 93 Production of 4-[N-(3,4-dimethoxyphenyl)carbamoylmethyl]-2- isopropylidenehydrazinothiazole: By following the similar procedure to the above Example 9 but using 4-carboxymethyl-2-isopropylidene- hydrazinothiazole produced in the above Example 71 and 3,4- dimethoxyaniline aε starting materials, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.88 (s, 3H), 1.92 (s, 3H), 3.52 (brs, 2H), 3.71 (s, 6H), 6.51 (brs, IH), 6.86 - 7.33 (m, 3H), 9.92 (brs, IH), 10.46 (brs, IH). EXAMPLE 94 Production of 2-isopropylidenehydrazino-4-(2-thiazolyl)- thiazole: By following the εimilar procedure to the above Example 17 but εubstituting the chloroacetone with 3- bromoacetylthiazole, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.94 (s, 3H), 1.96 (ε, 3H), 7.39 (s, IH), 7.69 (d, IH, J = 3.13 Hz) , 7.85 (d, IH), 10.88 (brε, IH) . EXAMPLE 95 Production of 2-iεopropylidenehydrazono-5-[N-(2-methoxy- carbonyl-4-methylphenyl)carbamoylmethyl]imidazolidin-4-one: By following the εimilar procedure to the above Example 9 but using 5-carboxymethyl-2-isopropylidene- hydrazinoimidazolidin-4-one produced in the above Example 80 and methyl 2-amino-5-methylbenzoate as starting materials, the above-mentioned target compound was obtained. NMR (CDC1 3 ) δ ppm: 2.02 (ε, 3H), 2.08 (ε, 3H), 2.34 (ε, 3H), 2.66 (dd, IH, J = 10.89 Hz, J = 16.49 Hz), 3.21 (dd, IH, J = 2.31 Hz, J = 16.50 Hz), 3.92 (s, 3H), 4.44 (dd, IH, J = 2.31 Hz, J = 10.89 Hz), 6.87 (s, IH), 7.26 (ε, IH), 7.37 (dd, IH, J = 1.97 Hz, J = 8.57 Hz), 7.84 (brs, IH), 8.51 (d, IH, J = 8.58 Hz) , 11.07 (brε, IH) . EXAMPLE 96 Production of 5-[N-(l-ethoxycarbonyl-3-methylbutyl )carbamoyl- methyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to the above Example 9 but εubstituting the ethyl 4-aminobenzoate with L- leucine ethyl ester, the above-mentioned target compound was obtained. NMR (DMS0-d 6 ) 8 ppm: 0.82 - 0.91 (m, 6H), 1.15 - 1.22 ( , 3H), 1.44 - 1.91 (m, 3H) , 1.94 (brs, 6H), 2.63 (ddd, IH, J = 2.31 Hz, J = 10.22 Hz, J = 16.16 Hz), 2.95 (dd, IH, J = 3.30 Hz, J = 16.16 Hz), 4.03 - 4.12 (m, 2H) , 4.13 - 4.24 (m, 2H) , 8.43 (dd, IH, J = 5.27 Hz, J = 7.58 Hz), 11.65 (brε, IH) . EXAMPLE 97 Production of 5-[N-(3-ethoxycarbonylphenyl)carbamoylmethyl]- 2-iεopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to the above Example 9 but εubstituting the ethyl 4-aminobenzoate with ethyl 3-aminobenzoate, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.32 (t, 3H), 1.94 (ε, 3H), 1.95 (ε, 3H), 2.90 (dd, IH, Jgem = 1.65 Hz, J = 9.24 Hz), 3.17 (dd, IH, J = 3.96 Hz) , 4.25 - 4.37 (m, 3H), 7.15 - 8.25 (m, 4H, phenyl), 10.36 (brε, IH), 11.70 (brε, IH) . EXAMPLE 98 Production of 5-{N-[l-ethoxycarbonyl-2-(4-benzyloxyphenyl )- ethyl]carbamoylmethyl}-2-iεopropylidenehydrazonothiazolidin- 4-one: By following the similar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with 0- benzyl-L-tyrosine ethyl ester, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.11 (t, 3H, J = 6.93 Hz), 1.93 (brs, 6H), 2.51 - 2.62 (m, IH) , 2.65 - 2.98 (m, 3H), 4.03 (q, 2H, J = 7.26 Hz) , 4.14 (dd, 0.5 H, J = 3.63 Hz, J = 9.89 Hz), 4.18 (dd, 0.5H, J = 3.63 hz, J = 9.89 Hz), 4.31 - 4.40 (m, IH), 5.06 (ε, 2H), 6.92 (d, 2H, J = 8.57 Hz) , 7.13 (d, 2H, J = 7.26 Hz) , 7.14 - 7.44 (m, 5H) , 8.52 (d, IH, J = 7.92 Hz) , 11.65 (brε, IH) . EXAMPLE 99 Production of 5-{N-[l-carboxy-2-(4-benzyloxyphenyl)ethyl]- carbamoylmethyl}-2-iεopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to the above Example 14 but uεing 5-{N-[l-ethoxycarbonyl-2-(4-benzyl- oxyphenyl)ethyl]carbamoylmethy1}-2-isopropy1idenehydrazono- thiazolidin-4-one as a εtarting material, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.93 (brs, 6H), 2.53 - 2.65 (m, IH), 2.75 - 3.01 (m, 3H), 4.15 (ddd, IH, J = 2.96 Hz, J = 10.22 Hz, J = 22.43 Hz) , 4.30 - 4.34 (m, IH) , 5.05 (s, 2H), 6.90 (d, 2H, J = 8.58 Hz) , 7.12 (d, 2H, J = 8.58 Hz) , 7.29 - 7.44 (m, 5H), 8.27 (d, IH, J = 7.92 Hz ) . EXAMPLE 100 Production of 2-isopropylidenehydrazono-5-{N-[ 1-methoxy- carbonyl-2-(3-indolyl)ethyl]carbamoylmethyl}thiazolidin-4-one: By following the similar procedure to the above Example 9 but substituting the ethyl 4-aminobenzoate with L- tryptophan methyl ester, the above-mentioned target compound was obtained. NMR (CDC1 3 ) 6 ppm: 1.93 (s, IH), 1.98 (d, 3H, J = 3.63 Hz ) , 2.51 - 2.60 (m, IH) , 2.89 - 2.97 (m, IH), 3.21 - 3.24 (m, 2H) , 4.13 - 4.17 (m, IH), 4.84 - 4.90 (m, IH) , 6.79 - 7.10 (m, 2H), 7.23 - 7.35 (m, 2H), 7.67 - 7.73 (m, IH) , 8.89 (d, IH, J = 12.20 Hz) . EXAMPLE 101 Production of 5-[N-( 1-carboxy-3-methylbutyl )carbamo lmethyl]* 2-iεopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to the above Example 14 but using 5-[N-(1-ethoxycarbonyl-3-methylbutyl)- carbamoylmethyl]-2-isopropylidenehydrazonothiazolidin-4-one produced in the above Example 96 aε a starting material, the above-mentioned target compound was obtained. NMR (DMSO-d 5 ) 8 ppm: 0.81 - 0.89 (m, 6H), 1.46 - 1.51 (m, 2H), 1.57 - 1.68 (m, IH), 1.94 (brε, 6H) , 2.49 - 2.66 (m, IH) , 2.95 (dd, IH, J = 3.30 Hz, J = 16.49 Hz), 4.17 - 4.23 (m, 2H), 8.27 (dd, IH, J = 5.28 Hz, J = 7.91 Hz). EXAMPLE 102 Production of 5-{N-[l-carboxy-2-(3-indolyl)ethyl]carbamoyl¬ methyl}-2-iεopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to the above Example 14 but uεing 2-iεopropylidenehydrazono-5-{N-[ 1- methoxycarbonyl-2-(3-indolyl )ethyl]carbamoylmethyl}- thiazolidin-4-one produced in the above Example 100 aε a εtarting material, the above-mentioned target compound waε obtained. NMR (DMSO-d 6 ) 8 ppm: 1.94 (brs, 6H), 2.53 - 2.67 (m, IH), 2.89 - 3.24 (m, 3H), 4.18 (ddd, IH, J = 3.30 Hz, J = 10.22 Hz, J = 22.43 Hz) , 4.44 - 4.51 (m, IH) , 6.95 - 7.15 (m, 3H), 7.33 (d, IH, J =■* 7.92 Hz), 7.53 (d, IH, J = 7.58 Hz) , 8.38 (d, IH, J = 7.59 Hz) , 10.85 (s, IH), 11.76 (brs, IH) . EXAMPLE 103 Production of 5-[N-(3-carboxyphenyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to the above Example 14 but using 5-[N-(3-ethoxycarbonylphenyl)carbamoyl¬ methyl]-2-isopropylidenehydrazonothiazolidin-4-one obtained the above Example 97 aε a starting material, the above- mentioned target compound was obtained. NMR (DMSO-d 6 ) 8 ppm: 1.94 (s, 3H), 1.95 (ε, 3H), 2.90 (dd, IH, Jgem - 16.50 Hz, J = 9.24 Hz), 3.17 (dd, IH, J = 3.96 Hz ) , 4 . 34 ( dd , IH ) , 7.40 - 8.22 (m, 4H, phenyl), 10.32 (brε, IH) . EXAMPLE 104 _ Production of 2-isopropylidenehydrazono-5-[N-(2-methoxy- carbonylmethylphenyl)carbamoylmethyl]thiazolidin-4-one: By following the εimilar procedure to the above Example 9 but εubεtituting the ethyl 4-aminobenzoate with methyl 2-aminophenylacetate, the above-mentioned target - n compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.94 (2s, 6H), 2.81 (dd, IH, Jgem = 16.17 Hz, J = 9.90 Hz), 3.16 (dd, IH, J = 3.63 Hz) , 15 3.60 (s, 3H), 3.68 (ε, 2H), 4.29 (dd, IH), 7.16 - 7.37 (m, 4H, phenyl), 9.60 (brε, IH), 20 11.69 (brε, IH). EXAMPLE 105 Production of 5-[N-(2-carboxymethylphenyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to the above _,. Example 14 but using 2-iεopropylidenehydrazino-5-[N-(2- methoxycarbonylmethylphenyl)carbamoylmethyl]thiazolidin-4-one obtained the above Example 104 as a starting material, the above-mentioned target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.94 (s, 6H), 2.83 (dd, IH, Jgem = 16.50 Hz, J = 9.89 Hz), 3.17 (dd, IH, J - 3.63 Hz) , 3.54 (ε, 2H), 4.31 (dd, IH), 7.07 - 8.20 (m, 6H), 10 10.33 (brs, IH) . EXAMPLE 106 Production of 2-iεopropylidenehydrazono-5(R)-(N-phenyl- carbamoylmethyl)thiazolidin-4-one: (Step 1) 5 1 Gram of methyl 2(S)-hydroxyεuccinamate produced in accordance with a method .deεcribed in Journal of the Organic Chemiεtry, 4_7, 4928 (1982) and 0.69 g of aniline were disεolved in a mixture of tetrahydrofuran with water (each 10 ml portion) and 2.59 g of water εoluble carbodiimide → j . hydrochloride waε added thereto. Then the pH value of the mixture waε maintained at 4 to 5 by adding 10 % hydrochloric acid and the mixture was allowed to react at room temperature for 10 minutes. Next, the reaction mixture was extracted with 30 ml of ethyl acetate and the organic layer was washed 25 with a saturated aqueous solution of εodium hydrogencarbonate and dried over anhydrouε sodium sulfate. After distilling off the solvent under reduced pressure, 1.5 g of methyl 2(S)- hydroxy-N-phenylsuccinamate was obtained as an oily substance. NMR (CDCI 3 ) δ ppm: 2.8 - 2.9 (m, 2H) , 5 3.83 (s, 3H), 4.58 (dd, IH, J = 6.93 Hz, J = 3.96 Hz), 7.08 - 7.51 (m, 5H, phenyl), 7.87 (brs, IH). lfJ (Step 2) The compound produced in the above Step 1 was disεolved in 30 ml of methylene chloride. Under ice-cooling, 1.41 ml of triethylamine and 0.78 ml of methanesulfonyl chloride were added thereto and the obtained mixture waε εtirred under ice-cooling for 10 minuteε. Then the reaction 15 mixture waε εuccessively washed with 0.1 N hydrochloric acid and a saturated aqueous solution of sodium chloride and dried over anhydrous sodium sulfate. After distilling off the solvent under reduced presεure, 1.82 g of methyl 2(S)- 20 methaneεulfonyloxy-N-phenylsuccinamate was obtained as an oily εubstance. NMR (CDCL 3 ) δ ppm: 3.03 - 3.06 (m, 2H), 3.17 (s, 3H), 3.85 (ε, 3H), 5 5.46 - 5.51 (m, IH), 7.13 - 7.52 (m, 5H, phenyl), 7.58 (brs, IH) . (Step 3) The compound produced in the above Step 2 was dissolved in 20 ml of ethanol and 1.06 g of acetone thiosemicarbazone and 0.66 g of anhydrouε sodium acetate were added thereto. The mixture thus obtained was refluxed under heating for 3 hours. Then the reaction mixture was allowed to cool and the solid thus formed was recovered by filtration, washed with water and recrystallized from 10 methanol. Thus 0.56 g of the above-mentioned target compound was obtained as white crystalε . [<*]" = +2.61° (C = 1.53, tetrahydrof ran) The data of NMR (DMSO-d 6 ) were identical with those ,c of the compound produced in the above Example 33. EXAMPLE 107 Production of 2-isopropylidenehydrazono-5 (S)-(N-phenyl- carbamoylmethyl)thiazolidin-4-one: By following the similar procedure to the above _ n Example 106 but εubεtituting the methyl 2(S)-hydroxy- εuccinamate with methyl 2(R)-hydroxyεuccinamate, the above- mentioned target compound waε obtained. [α]j; 5 = -2.58° (C = 1.50, tetrahydrofuran) The data of NMR (DMS0-d 6 ) were identical with those 25 of the compound produced in the above Example 33. EXAMPLE 108 Production of 5-[N-(4-chloro-2-methoxycarbonylphenyl)- carbamoylmethyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to Example 9 but subεtituting the ethyl 4-aminobenzoate with methyl 2-amino-5- chlorobenzoate, the above target compound waε obtained. NMR (DMSO-d 6 ) 6 ppm: 1.93 (ε, 3H), 1.94 (ε, 3H), 2.98 (dd, IH, Jgem = 16.50 Hz, J ■= 8.90 Hz), 3.20 (dd, IH, J = 3.96 Hz), 3.84 (s, 3H), 4.31 (dd, IH), 7.65 - 8.06 ( , 3H, phenyl), 10.50 (brε, IH) , 11.71 (brε, IH) . EXAMPLE 109 Production of 5-[N-(2-carboxy-4-chlorophenyl)carbamoyl¬ methyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to Example 14 but using 5-[N-(4-chloro-2-methoxycarbonylphenyl)carbamoyl¬ methyl]-2-iεopropylidenehydrazonothiazolidin-4-one produced in Example 108 as the starting compound, the above target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.93 (s, 3H), 1.95 (s, 3H), 2.98 (dd, IH, Jgem = 16.50 Hz, J = 9.08 Hz), 3.17 (dd, IH, J = 3.96 Hz) , 4.32 (dd, IH), 7.49 - 8.40 (m, 3H, phenyl), 12.49 (brε, IH) . EXAMPLE 110 Production of 2-iεopropylidenehydrazono-5-[N-(2, 3-dimethyl- phenyl)carbamoyl-methyl]thiazolidin-4-one: By following the εimilar procedure to Example 9 but substituting the ethyl 4-aminobenzoate with 2,3-dimethyl- aniline, the above target compound was obtained. NMR (DMSO-d 6 ) 6 ppm: 1.94 (s, 6H), 2.06 (ε, 3H), 2.24 (s, 3H), 2.85 (dd, IH, J - 9.90 Hz, J = 16.17 Hz), 3.18 (dd, IH, J = 3.63 Hz, J = 16.17 Hz), 4.32 (dd, IH, J = 3.95 Hz, J = 9.56 Hz), 6.99 - 7.14 (m, 3H), 9.53 (s, IH), 11.67 (s, IH). EXAMPLE 111 Production of 5-[N-(2-furanylmethyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to Example 9 but εubstituting the ethyl 4-aminobenzoate with 2-furanylmethyl- amine, the above target compound waε obtained. NMR (DMSO-d 6 ) 8 ppm: 1.94 (2s, 6H), 2.62 (dd, IH, Jgem = 16.17 Hz, J = 9.57 Hz), 2.94 (dd, IH, J = 3.96 Hz), 4.21 - 4.34 (m, 3H) , 6.25 - 7.58 (m, 3H) , 8.50 (t, IH, J = 5.28 Hz ) , 11.71 (brs, IH). EXAMPLE 112 Production of 5-[N-( 2 , 6-dimethylphenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to Example 9 but εubεtituting the ethyl 4-aminobenzoate with 2, 6-dimethyl- aniline, the above target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.95 (ε, 6H), 2.13 (s, 6H), 2.85 (dd, IH, J = 9.57 Hz, J - 16.17 Hz), 3.18 (dd, IH, J = 3.96 Hz, J = 16.17 Hz), 4.33 (dd, IH, J = 3.63 Hz, J = 9.56 Hz), 7 . 06 ( ε , 3H ) , 9 . 44 ( ε , IH ) , 11.68 (brε, IH) . EXAMPLE 113 Production of 2-iεopropylidenehydrazono-5-[N-(2-methoxy-5- methoxycarbonylphenyl)carbamoylmethyl]thiazolidin-4-one: By following the similar procedure to Example 9 but substituting the ethyl 4-aminobenzoate with methyl 3-amino-4- methoxybenzoate, the above target compound was obtained. - NMR (DMSO-d 6 ) δ ppm: 1.94 (ε, 3H), 1.95 (ε, 3H), 2.96 (dd, IH, Jgem = 16.82 Hz, J = 8.91 Hz), 3.82 (s, 3H), 3.92 (ε, 3H), 4.32 (dd, IH, J = 3.95 Hz), 7.15 - 8.62 (m, 3H, phenyl), 9.53 (brε, IH) , 11.69 (brε, IH) . EXAMPLE 114 Production of 5-[N-(5-carboxy-2-methoxyphenyl)carbamoyl¬ methyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to Example 14 but using 2-isopropylidenehydrazono-5-[N-( 2-methoxy-5- methoxycarbonylphenyl)carbamoylmethyl]thiazolidin-4-one produced in Example 113 as the starting compound, the above target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.94 (s, 3H), 1.95 (ε, 3H), 2.95 (dd, IH, Jgem = 16.82 Hz, J = 9.24 Hz), 3.28 (dd, IH, J - 3.63 Hz) , 4.31 (dd, IH), 7.11 - 8.57 (m, 3H, phenyl), 9.50 (brs, IH). EXAMPLE 115 Production of 5-[N-(4 ,5-dimethoxy-2-ethoxycarbonylphenyl)- carbamoylmethyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to Example 9 but substituting the ethyl 4-aminobenzoate with ethyl 2-amino- 4 ,5-dimethoxybenzoate, the above target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.33 (t, 3H, J = 6.93 Hz) , 1-93 (s, 3H), 1.95 (s, 3H), 3.01 (dd, IH, J = 9.24 Hz, J = 16.83 Hz), 3.20 (dd, IH, J = 3.96 Hz, J = 16.83 Hz), 3.77 (s, 3H), 3.81 (s, 3H), 4.27 - 4.35 (m, 3H) , 7.39 (s, IH), 7.98 (s, IH), 10.73 (s, IH), 11.71 (brε, IH) . EXAMPLE 116 Production of 5-[N-(2-carboxy-4,5-dimethoxyphenyl)carbamoyl¬ methyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to Example 14 but uεing 5-[N-(4,5-dimethoxy-2-ethoxycarbonylphenyl)carbamoyl¬ methyl]-2-isopropylidenehydrazonothiazolidin-4-one produced in Example 115 aε the starting compound, the above target compound was obtained. NMR (DMSO-d 6 ) 8 ppm: 1.94 [s, 3H), 1.95 Is, 3H), 3.02 'dd, IH, J = 8.91, 16.50 Hz) , 3.19 dd, IH, J = 3.96, 16.83 Hz) , 3.76 ε, 3H), 3.81 < s, 3H), 4.33 dd, IH, J = 3.63, 8.90 Hz) , 7.44 ( ε, IH), 8.18 ( ε, IH), 11.54 (brs, IH) EXAMPLE 117 Production of 5-[N-(2-benzyloxycarbonyl-l (S)-methoxycarbonyl- ethyl)-carbamoylmethyl]-2-iεopropylidenehydrazonothiazolidin- 4-one: By following the εimilar procedure to Example 9 but εubεtituting the ethyl 4-aminobenzoate with α-methyl, β- benzyl L-aεpartate, the above target compound waε obtained. NMR (DMS0-d 6 ) δ ppm: 1.92 (ε, 3H), 1.93 (ε, 3H), 2.57 - 2.99 (m, 2H), 3.61 (ε, 3H), 4.18 - 4.35 (m, IH) , 4.69 (dd, IH, J = 6.93 Hz, J = 13.53 Hz), 5.11 (ε, 2H), 7.36 (brε, 5H), 8.65 (dd, IH, J = 3.30 Hz, J = 7.59 Hz), 11.67 (brs, IH) . EXAMPLE 118 Production of 5-[N-(α-ethoxycarbonylbenzyl)carbamoylmethyl]- 2-isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to Example 9 but εubstituting the ethyl 4-aminobenzoate with DL-phenylglycine ethyl eεter, the above target compound waε obtained. NMR (DMSO-d 6 ) 8 ppm: 1.10 - 1.14 (m, 3H), 1.93 (s, 3H), 1.94 (ε, 3H), 2.66 - 2.76 (m, IH), 2.99 - 3.09 (m, IH), 4.04 - 4.13 (m, 2H) , 4.15 - 4.25 (m, IH) , 5.38 (t, IH, J = 5.27 Hz), 7.38 (s, 5H), 8.91 (t, IH, J = 6.27 Hz) , 11.65 (brε, IH) . EXAMPLE 119 Production of 5-[N-(α-carboxybenzyl)carbamoylmethyl]-2- isopropylidene-hydrazonothiazolidin-4-one: By following the similar procedure to Example 14 but using 5-[N-(α-ethoxycarbonylbenzyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one produced in Example 118 as the starting compound, the above target compound was obtained. NMR (DMS0-d 6 ) δ ppm: 1.93 (s, 3H), 1.94 (ε, 3H), 2.69 (dd, IH, J - 10.23 Hz, J = 16.50 Hz), 3.07 (dd, IH, J = 3.63 Hz, J = 16.83 Hz), 4.22 (dd, IH, J = 3.63 Hz, J = 10.22 Hz), 5.34 (d, IH, J = 7.59 Hz) , 7.32 - 7.39 ( , 5H) , 8 . 84 ( d , IH , J = 7 . 26 Hz ) . EXAMPLE 120 Production of 5-[N-(2-hydroxy-5-methoxycarbonylphenyl)- carbamoylmethyl]-2-iεopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to Example 9 but εubstituting the ethyl 4-aminobenzoate with methyl 3-amino-4- hydroxybenzoate, the above target compound waε obtained. NMR (DMSO-d 6 ) δ ppm: 1.94 (ε, 3H), !-95 (ε, 3H), 2.97 (dd, IH, Jgem - 16.82 Hz, J = 9.24 Hz), 3.28 (dd, IH, J = 3.96 Hz ) , 3.80 (s, 3H), 4.32 (dd, IH), 6.94 - 8.54 (m, 3H, phenyl), 9.47 (brε, IH), 10.83 (brs, IH) , 11.69 (brs, IH) . EXAMPLE 121 Production of 5-[N-(5-carboxy-2-hydroxyphenyl )carbamoyl¬ methyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to Example 14 but using 5-[N-( 2-hydroxy-5-methoxycarbonylphenyl)carbamoyl¬ methyl]-2-isopropylidenehydrazonothiazolidin-4-one produced in Example 120 as the starting compound, the above target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.94 (s, 3H), 1.95 (s, 3H), 2.98 (dd, IH, J = 16.49 Hz, J = 8.91 Hz), 3.27 (dd, IH, J = 16.49 Hz, J = 3.96 Hz), 4.32 (dd, IH, J = 8.91 Hz, J = 3.96 Hz), 6.99 - 8.74 (m, 3H) , 9.48 (brs, IH), 10.86 (brs, IH), 11.52 (brs, IH) . EXAMPLE 122 Production of 5-[N-(4-fluorophenyl)carbamoylmethyl]-2- isopropylidene-hydrazonothiazolidin-4-one: By following the similar procedure to Example 9 but subεtituting the ethyl 4-aminobenzoate with 4-fluoroaniline, the above target compound waε obtained. NMR (DMSO-d 6 ) 8 ppm: 1.94 (s, 3H), 1.95 (s, 3H), 2.85 (dd, IH, Jgem = 16.49 Hz, J = 9.24 Hz), 3.14 (dd, J = 3.96 Hz) , 4.32 (dd, IH), 7.11 - 7.60 ( , 4H, phenyl), 10.17 (brε, IH) , 11.69 (brs, IH). EXAMPLE 123 Production of 5-[N-(2-carboxy-4-methylphenyl )carbamoyl¬ methyl]-2-isopropylidenehydrazonoimidazolidin-4-one: By following the similar procedure to Example 9 but using 5-carboxymethyl-2-isopropylidenehydrazonoimidazolidin- 4-one produced in Example 80 and methyl 2-amino-5-methyl- benzoate as the starting compounds, 2-isopropylidene- hydrazono-5-[N-(2-methoxycarbonyl-4-methylphenyl)carbamoyl- methylimidazolidin-4-one waε produced. Thiε product was treated in the same manner as in Example 14 to give thereby the above target compound. NMR (DMSO-d 6 ) δ ppm: 1.89 (s, 3H), 1.91 (s, 3H), 2.29 (s, 3H), 2.77 - 2.81 (m, 2H), 4.25 (t, IH, J = 5.61 Hz) , 7.38 (dd, IH, J = 1.98 Hz, J = 8.57 Hz), 7.78 (d, IH, J = 1.98 Hz) , 8.31 (d, IH, J = 8.25 Hz) , 11.13 (ε, IH). EXAMPLE 124 Production of 5-[N-(4-hydroxy-2-methoxycarbonylphenyl )- carbamoylmethyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to Example 9 but εubstituting the ethyl 4-aminobenzoate with methyl 2-amino-5- hydroxybenzoate, the above target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.93 (s, 3H), 1.94 (ε, 3H), 2.88 (dd, IH, Jgem = 16.50 Hz, J = 9.24 Hz), 0 3.13 (dd, IH, J = 3.96 Hz) , 3.81 (ε, 3H), 4.28 (dd, IH), 6.96 - 7.74 (m, 3H, phenyl), 5 9.69 (brε, IH), 10.15 (brs, IH), 11.68 (brs, IH) . EXAMPLE 125 Production of 5-[N-(2-carboxy-4-hydroxyphenyl)carbamoyl- n methyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to Example 14 but uεing 5-[ -(4-hydroxy-2-methoxycarbonylphenyl)carbamoyl¬ methyl]-2-iεopropylidenehydrazonothiazolidin-4-one produced in Example 124 aε the starting compound, the above target _z compound was obtained. NMR (DMSO-d 6 ) 6 ppm: 1.94 (ε, 6H), 2.93 (dd, IH, Jgem = 16.50 Hz, J = 9.23 Hz), 3.14 (m, IH), 4.29 - 4.31 (m, IH) , 6.97 - 8.09 (m, 3H, phenyl), 9.60 (brε, IH), 10.67 (brε, IH), 11.68 (brε, IH) . EXAMPLE 126 10 Production of 5-[N-[4-[ (6-acetoxy-2,5 , 7 , 8-tetramethylchroman- 2-yl)methoxy]phenyl]carbamoylmethyl]-2-isopropylidene- hydrazonothiazolidin-4-one: By following the similar procedure to Example 9 but substituting the ethyl 4-aminobenzoate with 6-acetoxy-2-[ (4- _. - aminophenoxy)methyl]-2,5,7 , 8-tetramethylchromane produced in accordance with the procedure as discloεed in T. Yoεhioka, T. Fujita, T. Kanai, Y. Aizawa, T. Kurumada, K. Haεegawa, H. Horikoεhi, J. Med. Chem., 3.2, 1 (1989), the above target compound was obtained. 20 NMR (DMSO-d 6 ) δ ppm: 1.33 (ε, 3H), 1.8 - 2.1 (m, 17H), 2.30 (ε, 3H), 2.62 (t, 2H, J = 6.60 Hz ) , 25 2.82 (dd, IH, J = 9.57 Hz, J = 16.49 Hz), 3.12 (dd, IH, J = 3.96 Hz, J = 16.49 Hz), 3.97 (q, 2H), 4.31 (dd, IH, J = 3.96 Hz, J = 9.57 Hz), 6.92 (d, 2H, J = 8.90 Hz) , 7.45 (d, 2H, J = 9.24 Hz), 9.97 (s, IH), 11.69 (brε, IH) . EXAMPLE 127 Production of 5-[N-[4-[ (6-hydroxy-2,5, 7 , 8-tetramethylchroman- 2-yl)methoxy]phenyl]carbamoylmethyl]-2-isopropylidene- hydrazonothiazolidin-4-one: 0.6 g of 5-[N-[4-[ (6-acetoxy-2,5,7,8-tetramethyl- chroman-2-yl )methoxy]phenyl]carbamoylmethyl]-2-iso- propylidenehydrazonothiazolidin-4-one produced in Example 126 waε diεsolved in 10 ml of methanol. After adding a 1 N aqueous solution of sodium hydroxide, the mixture was stirred at room temperature for 2 hours . Then the reaction mixture was extracted with a mixture of ethyl acetate with 0.1 N hydrochloric acid. The organic layer was collected, washed with a saturated aqueous solution of sodium chloride and dried over anhydrous sodium sulfate. After distilling off the solvent under reduced presεure, 0.49 g of the above target compound waε obtained aε a pale yellow amorphous powder. NMR (DMS0-d 6 ) δ ppm: 1.29 (s, 3H), 1.8 - 2.1 (m, 17H) , 2.56 (t, 2H), 2.82 (dd, IH, J = 9.57 Hz, J = 16.49 Hz), 3.12 (dd, IH, J = 3.63 Hz, J = 16.49 Hz), 3.92 (q, 2H), 4.31 (dd, IH, J = 3.63 Hz, J = 9.57 Hz), 6.91 (d, 2H, J = 9.24 Hz) , 7.45 (d, 2H, J = 8.91 Hz) , 9.96 (ε, IH), 11.70 (brε, IH) . EXAMPLE 128 Production of 2-iεopropylidenehydrazono-5-[N-[3-(trifluoro¬ methyl)phenyl]carbamoylmethyl]thiazolidin-4-one: By following the εimilar procedure to Example 9 but εubstituting the ethyl 4-aminobenzoate with 3-(trifluoro¬ methyl)aniline, the above target compound was obtained. NMR (DMS0-d 6 ) δ ppm: 1.94, 1.95 (ε, s, 6H), 2.92 (dd, IH, J = 9.23, 16.83 Hz), 3.18 (dd, IH, J = 3.96, 16.83 Hz), 4.34 (dd, IH, J = 3.96, 9.23 Hz), 7.41 (d, IH, J = 7.59 Hz) , 7.56 (t, IH, J = 7.92 Hz) , 7.72 (d, IH, J = 8.25 Hz) , 8.07 (s, IH), 10.47 (s, IH), 11.72 (brε, IH) . EXAMPLE 129 Production of 2-iεopropylidenehydrazono-5-[N-(4-methoxy-2- methylphenyl)carbamoylmethyl]thiazolidin-4-one: By following the εimilar procedure to Example 9 but εubεtituting the ethyl 4-aminobenzoate with 4-methoxy-2- methylaniline, the above target compound waε obtained. NMR (DMS0-d 6 ) 8 ppm: 1.94 (ε, 6H), 2.15 (ε, 3H), 2.81 (dd, IH, Jgem = 16.16 Hz, J = 9.57 Hz), 3.15 (dd, IH, J - 3.96 Hz), 3.72 (s, 3H), 4.30 (dd, IH), 6.70 - 7.20 (m, 3H, phenyl), 9.38 (brε, IH), 11.68 (brs, IH). EXAMPLE 130 Production of 5-[N-(4-fluoro-2-methoxycarbonylphenyl )- carbamoylmethyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to Example 9 but substituting the ethyl 4-aminobenzoate with methyl 2-amino-5- fluorobenzoate, the above target compound was obtained. NMR (DMS0-d 6 ) δ ppm: 1-93 (s, 3H), 1.94 (ε, 3H), 2.95 (dd, IH, Jgem = 16.50 Hz, J = 9.24 Hz), 3.18 (dd, IH, J = 3.96 Hz), 3.84 (ε, 3H), 4.31 (dd, IH), 7.45 - 7.98 (m, 3H, phenyl), 10.39 (brε, IH), 11.70 (brε, IH) . EXAMPLE 131 Production of 5-[N-(2-carboxy-4-fluorophenyl)carbamoyl¬ methyl]-2-iεopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to Example 14 but using 5-[N-(4-fluoro-2-methoxycarbonylphenyl)-carbamoyl¬ methyl]-2-isopropylidenehydrazonothiazolidin-4-one produced in Example 130 as the starting compound, the above target compound was obtained. NMR (DMSO-d 6 ) 8 ppm: 1.94 (s, 3H), 1.95 (s, 3H), 3.01 (dd, IH, Jgem = 16.83 Hz, J = 8.90 Hz), 3.20 (dd, IH, J = 3.96 Hz), 4.32 (dd, IH), 7.44 - 8.34 (m, 3H, phenyl), 10.91 (brs, IH), 11.60 (brs, IH). EXAMPLE 132 Production of 5-[N-(3-fluoro-2-methoxycarbonylphenyl)- carbamoylmethyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to Example 9 but substituting the ethyl 4-aminobenzoate with methyl 2-amino-6- fluorobenzoate, the above target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.94 (s, 3H), 1.95 (ε, 3H), 2.86 (dd, IH, Jgem = 16.82 Hz, J = 9.24 Hz), 3.14 (dd, IH, J = 3.63 Hz) , 3.79 (ε, 3H), 4.28 (dd, IH), 7.08 - 7.57 (m, 3H, phenyl), 10.21 (brε, IH) , . 11.68 (brε, IH). EXAMPLE 133 Production of 5-[N-( 2-carboxy-3-fluorophenyl)carbamoyl¬ methyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to Example 14 but using 5-[ -(3-fluoro-2-methoxycarbonylphenyl)carbamoyl¬ methyl]-2-iεopropylidenehydrazonothiazolidin-4-one produced in Example 132 as the starting compound, the above target compound was obtained. NMR (DMSO-d 6 ) δ ppm: 1.94 (2s, 6H), 2.88 (dd, IH, Jgem = 16.50 Hz, J = 9.57 Hz), 3.17 (dd, IH, J = 3.63 Hz) , 4.29 (dd, IH), 7.04 - 7.59 (m, 3H, phenyl), 10.26 (brs, IH) , 11.75 (brs, IH) . EXAMPLE 134 Production of 2-isopropylidenehydrazono-5-[N-(2-methoxy- carbonyl-5-methyl-phenyl)carbamoylmethyl]thiazolidin-4-one: By following the εimilar procedure to Example 9 but substituting the ethyl 4-aminobenzoate with methyl 2-amino-4- methylbenzoate, the above target compound was obtained. NMR (DMS0-d 6 ) δ ppm: 1.93 (s, 3H), 1.95 (s, 3H), 2.35 (s, 3H), 3.01 (dd, IH, Jgem - 16.50 Hz, J = 8.91 Hz), 3.20 (dd, IH, J = 3.96 Hz ) , 3.84 (s, 3H), 4.31 (dd, IH), 7.02 - 8.04 (m, 3H, phenyl). EXAMPLE 135 Production of 5-[N-( 2-carboxy-5-methylphenyl)carbamoyl¬ methyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the similar procedure to Example 14 but using 5-[N-(2-methoxycarbonyl-5-methylphenyl)carbamoyl- methyl]thiazolidin-4-one produced in Example 134 aε the εtarting compound, the above target compound waε obtained. NMR (DMSO-d 6 ) 8 ppm: 1.94 (ε, 3H), 1.95 (ε, 3H), 2.35 (s, 3H), 3.05 (dd, Jgem = 16.50 Hz, J = 8.58 Hz), 3.20 (m, IH), 4.32 (dd, IH, J = 3.96 Hz), 10 6.97 - 8.28 (m, 3H, phenyl), 11.18 (brε, IH), 11.73 (brs, IH), 13.42 (brs, IH) . EXAMPLE 136 ,5 Production of 2-isopropylidenehydrazono-5-[N-(3-methoxy- carbonyl-5-(trifluoromethyl)phenyl]carbamoylmethyl]- thiazolidin-4-one: By following the εimilar procedure to Example 9 but εubεtituting the ethyl 4-aminobenzoate with methyl 3-amino-5- 20 (trifluoromethyl)benzoate, the above target compound waε obtained. NMR (DMSO-d 6 ) 8 ppm: 1.94 (ε, 3H), 1.95 (ε, 3H), 5 2.96 (dd, IH, Jgem = 16.82 Hz, J = 8.91 Hz), 3.19 (dd, IH, J = 3.96 Hz) , 3.91 (s, 3H), 4.35 (dd, IH), 7.87 (brs, IH), 8.26 (brs, IH), 8.42 (brs, IH), 10.71 (brs, IH), 11.72 (brs, IH) . EXAMPLE 137 Production of 5-[N-[ 3-carboxy-5-(trifluoromethyl)phenyl]- carbamoylmethyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to Example 14 but uεing 2-iεopropylidenehydrazono-5-[N-[3-methoxy-carbonyl-5- (trifluoromethyl)phenyl]carbamoylmethyl]thiazolidin-4-one produced in Example 136 as the starting compound, the above target compound was obtained. NMR (DMS0-d 6 ) 8 ppm: 1.94 r s, 3H), 1.95 s, 3H), 2.96 dd, IH, Jgem = 16.49 Hz, J = = 8.91 Hz) , 3.20 dd, IH, J = 3.96 Hz) , 4.35 dd, IH), 7.85 brs, IH), 8.26 brs, IH), 8.37 brε, IH), 10.68 (brε, IH), 11.76 (brε, IH). EXAMPLE 138 Production of 2-isopropylidenehydrazono-5-[N-[4-(trifluoro¬ methyl)phenyl]carbamoylmethyl]thiazolidin-4-one: By following the similar procedure to Example 9 but substituting the ethyl 4-aminobenzoate with 4-(trifluoro¬ methyl)aniline, the above target compound was obtained. NMR (DMSO-d 6 ) 8 ppm: 1.93 (s, 3H), 1.95 (s, 3H), 10 2.93 (dd, IH, Jgem = 16.50 Hz, J = 9.24 Hz), 3.20 (dd, IH, J = 3.96 Hz) , 4.35 (dd, IH), 7.66 - 7.79 (m, 4H, phenyl), 10.49 (brs, IH), 15 11.71 (brs, IH). EXAMPLE 139 Production of 2-isopropylidenehydrazono-5-[N-(4-methoxy-2- methoxycarbonyl-phenyl)carbamoylmethyl]thiazolidin-4-one: By following the similar procedure to Example 9 but 20 subεtituting the ethyl 4-aminobenzoate with methyl 2-amino-5- methoxybenzoate, the above target compound waε obtained. NMR (DMSO-d f i) δ ppm: 1.93 (s, 3H), » 1.94 (ε, 3H) , 25 2.91 (dd, IH, Jgem = 16.50 Hz, J = 9.24 Hz), 3.16 (dd, IH, J = 16.50 Hz, J = 3.63 Hz), 3.78 (ε, 3H), 3.83 (s, 3H), 4.30 (dd, IH, J = 9.24 Hz, J = 3.63 Hz), 7.17 - 7.84 (m, 3H, phenyl), 10.24 (brε, IH), 11.70 (brε, IH) . EXAMPLE 140 Production of 5-[N-(2-carboxy-4-methoxyphenyl )carbamoyl¬ methyl]-2-isopropylidenehydrazonothiazolidin-4-one: By following the εimilar procedure to Example 14 but uεing 2-iεopropylidenehydrazono-5-[N-(4-methoxy-2-carbonyl- phenyl)carbamoylmethyl]thiazolidin-4-one produced in Example 139 as the starting compound, the above target compound waε obtained. NMR (DMSO-d 6 ) 6 ppm: 1.93 (s . 3H), 1.94 (ε, 3H), 2.96 (dd, IH, J = 16.50 Hz, J ■ = 9.24 Hz), 3.17 (dd, IH, J = 16.50 Hz, J = 3.63 Hz), 3.77 (ε, 3H), 4.31 (dd, IH, J = 9.24 Hz, J = 3.63 Hz), 7.17 - 8.21 (m, 3H, phenyl), 10.76 (brε, IH), 11.72 (brs, IH), 13.60 (brs, IH) . PHARMACOLOGICAL TEST The effects of the compounds of the present invention represented by the general formula (1 ) for inhibiting Maillard reaction were proved by the following screening system. Lyεozyme and fructoεe were dissolved in a buffer solution of 0.2 M sodium phosphate (pH 7.4) to reεpectively give concentrationε of 10 mg/ml and 100 mM. After incubating at 37°C for 3 days, a definite amount of the mixture was taken out and electrophoreεed with the uεe of SDS-PAGE. After the completion of the electrophoreεis, the gel waε stained with 0.2 % Coomasεie Brilliant Blue R-250 and the amount of the dimer thus formed was determined. Each of the test compounds was added before the initiation of the incubation and the effect of suppressing the formation of the dimer was examined at various concentrationε, whereby the IC 50 value was obtained. As a positive control, aminoguanidine, which is a known glycation inhibitor, was employed and the inhibition ratio of the test compound to aminoguanidine (IC 50 of aminoguanidine/IC 50 of test compound) was calculated. The test compounds are as follows . 1. 5-(4-Benzyloxybenzyl )-2-isopropylidenehydrazono- imidazolidin-4-one 2. 2-Isopropylidenehydrazono-5-methylimidazolidin-4-one 3. 5-Benzyl-2-iεopropylidenehydrazonoimidazolidin-4-one 4. 5-(4-Hydroxybenzyl)-2-isopropylidenehydrazono- imidazolidin-4-one 5. 5-[4-(2,6-Dichlorobenzyloxy)benzyl]-2-isopropylidene- hydrazonoimidazolidin-4-one 6. 5-[4-(4-Chlorobenzyloxy)benzyl]-2-iεopropylidene- hydrazonoimidazolidin-4-one 7. 5-(4-Hydroxyphenyl)-2-isopropylidenehydrazono- imidazolidin-4-one 8. 5-(4-Hydroxybenzyl)-2-isopropylidenehydrazono-3-(4- ethoxybenzyl)imidazolidin-4-one 9. 3-Benzyl-5-(4-hydroxybenzyl)-2-isopropylidenehydrazono- imidazolidin-4-one 10. 2-Isopropylidenehydrazono-5-(4-phenylthiobenzyl)- imidazolidin-4-one 11. 2-Iεopropylidenehydrazono-5-(4-methylthiobenzyl)- thiazolidin-4-one 12. 5-(4-Benzyloxybenzyl )-2-isopropylidenehydrazono- thiazolidin-4-one 13. 5-Carboxymethyl-2-isopropylidenehydrazonothiazolidin-4- one 14. 2-Isopropylidenehydrazono-5-(N-propylcarbamoylmethyl )- thiazolidin-4-one 15. 5-[N-(4-ethoxycarbonylphenyl )carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one 16. 5-[N-(4-carboxyphenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one 17. 2-Isopropylidenehydrazono-5-[N-( 2-oxo-l,2,3,4-tetra- hydro-quinolin-3-yl)carbamoylmethyl]thiazolidin-4-one 18. 5-(N-cyclohexylcarbamoylmethyl )-2-isopropylidene- hydrazonothiazolidin-4-one 19. 5-(N-ethoxycarbonylmethylcarbamoylmethyl)-2-iso- propylidenehydrazonothiazolidin-4-one 20. 5-Carboxymethyl-3-ethoxycarbonylmethyl-2- isopropylidenehydrazonothiazolidin-4-one 21. 2-Isopropylidenehydrazono-3-phenylthiazolidin-4-one 22. 2-Isopropylidenehydrazino-4-phenylthiazole 23. 2-Isopropylidenehydrazino-4-methylthiazole 24. 4-(4-Chlorophenyl)-2-isopropylidenehydrazinothiazole 25. 2-Iεopropylidenehydrazino-4-(4-phenylthiophenyl)- thiazole 26. 4-(3,4-Dihydroxyphenyl)-2-iεopropylidenehydrazino- thiazole 27. 4-[4-(4-Chlorobenzyloxy)phenyl]-2-iεopropylidene- hydrazinothiazole 28. 2-Isopropylidenehydrazino-4 ,5,6, 7-tetrahydrobenzo- thiazole 29. 9-Benzyloxymethyl-l,4,5, 7-tetraazabicyclo[4.3.0]nonan- 5-ene-3,8-dione 30. 5-(N-Benzylcarbamoylmethyl)-2-isopropylidenehydrazono- thiazolidin-4-one 31. 5-(N-isopropylcarbamoylmethyl)-2-isopropylidene- hydrazonothiazolidin-4-one 32. 2-Iεopropylidenehydrazono-5-( -phenylcarbamoylmethyl)- thiazolidin-4-one 33. 2-Iεopropylidenehydrazono-5-(4-nitrobenzyl )- imidazolidin-4-one 34. 5-[4-(4-Chlorophenylthio)benzyl]-2-isopropylidene- hydrazonothiazolidine-4-one 35. 5-[4-(Cyclohexylmethyloxy)benzyl]-2-isopropylidene- hydrazonoimidazolidin-4-one 36. 2-Iεopropylidenehydrazono-5-[4-( 2-thienylmethoxy)- benzyl]imidazolidin-4-one 37. 5-(4-Benzylbenzyl)-2-iεopropylidenehydrazono- imidazolidin-4-one 38. 2-Isopropylidenehydrazono-5-[4-(2-phenylethoxy)benzyl]- imidazolidin-4-one 39. 5-[4-(4-Chlorobenzoylamino)benzyl]-2-isopropylidene- hydrazonoimidazolidin-4-one 40. 5-(3-Indolylmethyl)-2-isopropylidenehydrazono- imidazolidin-4-one 41. 5-(5-Hydroxy-3-indolylmethyl )-2-iεopropylidene- hydrazonoimidazolidin-4-one 42. 5-(3,4-Dihydroxybenzyl)-2-iεopropylidenehydrazono- imidazolidin-4-one 43. 2-Iεopropylidenehydrazono-5-methoxycarbonylmethyl- imidazolidin-4-one 44. 5-Benzyloxycarbonylmethyl-2-isopropylidenehydrazono- imidazolidin-4-one 45. 5-Carboxymethyl-2-isopropylidenehydrazonoimidazolidin- 4-one 46. 2-Isopropylidenehydrazono-5-(N-phenylcarbamoylmethyl)- imidazolidin-4-one 47. 5-(N-carboxymethylcarbamoylmethyl)-2-iεopropylidene- hydrazonothiazolidin-4-one 48. 2-Isopropylidenehydrazono-5-[4-(3-pyridylmethoxy)- benzyl]thiazolidin-4-one 49. 5-[N-(3,4-difluorophenyl)carbamoylmethyl]-2-iso- propylidenehydrazonothiazolidin-4-one 50. 5-[N-(4-benzyloxyphenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one 51. 5-[N-(4-chlorophenyl)carbamoylmethyl]-2-iεopropylidene- hydrazonothiazolidin-4-one 52. 2-Iεopropylidenehydrazono-5-[N-(4-methoxyphenyl)- carbamoylmethyl]thiazolidin—4-one 53. 2-Isopropylidenehydrazono-5-[N-(4-methylphenyl )- carbamoylmethyl]thiazolidin-4-one 54. 5-[N-(2-carboxy-4-methylphenyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one 55. 2-Isopropylidenehydrazono-5-[N-(4-methylthiophenyl)- carbamoylmethyl]thiazolidin-4-one 56. 5-[N-(4-bromophenyl)carbamoylmethyl]-2-isopropylidene- hydrazonothiazolidin-4-one 57. 2-Iεopropylidenehydrazono-5-[N-(3,4,5-trichlorophenyl)- carbamoylmethyl]thiazolidin-4-one 58. 2-Iεopropylidenehydrazono-5-[N-(3,4-methylenedioxy- phenyl)carbamoylmethyl]thiazolidin-4-one K 59. 2-Iεopropylidenehydrazono-5-[N-(l-naphthyl)carbamoyl¬ methyl]thiazolidin-4-one 60. 5-[N-(3,5-dichlorophenyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one 61. 3-Ethoxycarbonylmethyl-5-(N-phenylcarbamoylmethyl)-2- isopropylidenehydrazonothiazolin-4-one 62. 5-(4-Benzyloxycarbonylaminobutyl )-2-isopropylidene- 0 hydrazonoimidazolidin-4-one 63. 2-Isopropylidenehydrazono-5-(4-methoxycarbonylamino- butyl )imidazolidin-4-one 64. 5-(N-cyclopropylcarbamoylmethyl )-2-isopropylidene- hydrazonoimidazolidin-4-one 65. 2-Iεopropylidenehydrazono-5-(N-methyl-N-phenyl- carbamoylmethyl)thiazolidin-4-one 5 66. 2-Iεopropylidenehydrazono-5-[N-( 3-pyridylmethyl )- carbamoylmethyl]thiazolidin-4-one 67. 2-Iεopropylidenehydrazono-5-(2-methylpropyl )- imidazolidin-4-one 68. 2-Iεopropylidenehydrazono-5-[N-(3-imidazol-l-yl)propyl- carbamoylmethyl]thiazolidin-4-one 0 69. 2-Isopropylidenehydrazono-5-(N-morpholinocarbamoyl- methyl)thiazolidin-4-one 70. 2-Iεopropylidenehydrazono-5-[N-( 2-thienylmethyl)- carbamoylmethyl]thiazolidin-4-one 71. 2-Iεopropylidenehydrazono-5-[N-(4-morpholinophenyl)- carbamoylmethyl]thiazolidin-4-one 72. 2-Isopropylidenehydrazono-5-[N-(1-phenylethyl)- carbamoylmethyl]thiazolidin-4-one 73. 2-Iεopropylidenehydrazono-5-[N-(1-phenylethyl)- carbamoylmethyl]imidazolidin-4-one 74. 5-(4-Benzyloxybenzyl)-2-hydrazonoimidazolidin-4-one hydrochloride 75. 5-(4-Benzyloxybenzyl)-2-(4-bromobenzeneεulfono- hydrazonoimidazolidin-4-one 76. 2-(4-Acetoamidobenzenesulfonohydrazono)-5-(4-benzyloxy- benzyl)imidazolidin-4-one 77. 2-Cyclopentylidenehydrazono-5-(4-benzyloxybenzyl )- imidazolidin-4-one 78. 5-(4-Imidazolylmethyl)-2-isopropylidenehydrazono- imidazolidin-4-one 79. 5-Isopropyl-2-isopropylidenehydrazonoimidazolidin-4-one 80. 2-Isopropylidenehydrazono-5-[ 2-(N-phenylcarbamoy1)- ethyl]imidazolidin-4-one 81. 2-Hydrazono-5-(N-phenylcarbamoylmethyl)thiazolidin-4- one 82. 2-Dicyclopropylmethylenehydrazono-5-(N-phenylcarbamoyl- methyl)thiazolidin-4-one 83. 2-Cyclohexylmethylenehydrazono-5-(N-phenylcarbamoyl- methyl)thiazolidin-4-one 84. 2-Isopropylidenehydrazono-5-[N-(2-methyl-5-methoxy- carbonylphenyl )carbamoylmethyl]thiazolidin-4-one 85. 2-Iεopropylidenehydrazono-5-[N-(2-methoxycarbonyl-4- methylphenyl)carbamoylmethyl]thiazolidin-4-one 86. 2-Isopropylidenehydrazino-4-trifluoromethylthiazole 87. 4-Ethoxycarbonylmethyl-2-isopropylidenehydrazino- thiazole 88. 4-Carboxymethyl-2-iεopropylidenehydrazinothiazole 89. 2-Isopropylidenehydrazino-4-(3-pyridyl )thiazole 90. 5-[N-( 3,4-dimethoxyphenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one 91. 5-[N-(5-carboxy-2-methylphenyl )carbamoylmethyl]-2-iso- propylidenehydrazonothiazolidin-4-one 92. 5-[N-(2-carboxyphenyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one 93. 2-Iεopropylidenehydrazono-5-[N-(2-methoxycarbonyl¬ phenyl)carbamoylmethyl]thiazolidin-4-one 94. 4-[N-(3,4-dimethoxypheny1)carbamoylmethyl]-2-iso- propylidenehydrazinothiazole 95. 2-Isopropylidenehydrazino-4-(2-thiazolyl)thiazole 96. 2-Isopropylidenehydrazono-5-[N-(2-methoxycarbonyl-4- methylphenyl)carbamoylmethyl]imidazolidin-4-one 97. 5-[N-(l-ethoxycarbonyl-3-methylbutyl)carbamoylmethyl]- 2-iεopropylidenehydrazonothiazolidin-4-one 98. 4-(4-Carboxyphenyl)-2-iεopropylidenehydrazinothiazole 99. 2-Iεopropylidenehydrazino-4-(3-thienyl)thiazole 100. 5-{N-[ l-ethoxycarbonyl-2-(4-benzyloxyphenyl)ethyl]- carbamoylmethyl}-2-iεopropylidenehydrazonothiazolidin- 4-one 101. 5-{N-[l-carboxy-2-(4-benzyloxyphenyl)ethyl]carbamoyl¬ methyl}-2-iεopropylidenehydrazonothiazolidin-4-one 102. 2-Iεopropylidenehydrazono-5-{N-[ l-methoxycarbonyl-2-(3- indolyl)ethyl]carbamoylmethyl}thiazolidin-4-one 103. 5-[N-( l-carboxy-3-methylbutyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one 104. 5-{N-[l-carboxy-2-(3-indolyl)ethyl]carbamoylmethyl}-2- iεopropylidenehydrazonothiazolidin-4-one 105. 5-[N-(3-ethoxycarbonylphenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one 106. 5-[N-(3-carboxyphenyl)carbamoylmethyl]-2-iεo- propylidenehydrazonothiazolidin-4-one 107. 2-Isopropylidenehydrazono-5-[N-( 2-methoxycarbonyl- methylphenyl)carbamoylmethyl]thiazolidin-4-one 108. 5-[N-(2-carboxymethylphenyl)carbamoylmethyl]-2-iso- propylidenehydrazonothiazolidin-4-one 109. 2-Iεopropylidenehydrazono-5(R)-(N-phenylcarbamoyl- methyl)thiazolidin-4-one 110. 2-Isopropylidenehydrazono-5(S)-(N-phenylcarbamoyl- methyl)thiazolidin-4-one 111. 5-[N-(2-carboxy-4-chlorophenyl )carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one 112. 5-[N-(2, 6-dimethylphenyl)carbamoylmethyl]-2-iso- propylidenehydrazonothiazolidin-4-one 113. 5-[N-(5-carboxy-2-methoxyphenyl )carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one 114. 5-[N-(2-carboxy-4,5-dimethoxyphenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one 115. 2-Iεopropylidenehydrazono-5-[N-[3-(trifluoromethyl)- phenyl]carbamoylmethyl]thiazolidin-4-one 116. 2-Iεopropylidenehydrazono-5-[N-(4-methoxy-2-methyl- phenyl)carbamoylmethyl]thiazolidin-4-one 117. 5-[N-(2-carboxy-4-fluorophenyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one 118. 5-[N-(3-fluoro-2-methoxycarbonylphenyl)carbamoyl¬ methyl]-2-isopropylidenehydrazonothiazolidin-4-one 119. 5-[N-(2-carboxy-3-fluorophenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one 120. 5-[N-(2-carboxy-5-methylphenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one The resultε are given in Table 1 below. TABLE 1 Teεt compound IC-n of aminoσuanidine/IC .n of teεt compound 1 3.6 2 2.8 3 1.6 4 4.8 5 8.0 6 8.3 7 1.1 8 1.8 9 1.3 10 5.4 11 1.2 12 1.1 13 2.5 14 3.1 15 1.2 16 1.9 17 3.5 18 1.5 19 4.8 20 3.0 21 0.8 22 3.1 23 3.0 24 2.8 TABLE 1 (cont'd) Teεt compound IC*,, of aminoquanidine/IC-n of test compound 25 11.4 26 4.4 27 1.8 28 4.4 29 0.6 30 3.5 31 2.5 32 5.5 33 2.4 34 0.6 35 0.8 36 3.5 37 1.7 38 4.2 39 1.7 40 2.6 41 4.5 42 78.9 43 5.4 44 5.2 45 4.8 46 5.7 47 0.3 48 11.0 TABLE 1 (cont'd) Teεt compound IC*,., of aminoquanidine/ICsn of test compound 49 7.4 50 0.3 51 5.3 52 10.2 53 0.8 54 9.2 55 0.8 56 1.2 57 1.3 58 1.8 59 0.6 60 1.1 61 0.91 62 5.7 63 5.3 64 4.5 65 6.8 66 4.6 67 2.6 68 3.5 69 5.0 70 3.6 71 5.8 72 7.0 TABLE 1 (cont'd) Test compound IC- n of aminoguanidine/ICsn of test compound 73 1.3 74 0.6 75 1.5 76 1.4 77 2.2 78 4.0 79 1.5 80 3.1 81 0.8 82 2.3 83 1.8 84 7.9 85 0.25 86 3.4 87 3.3 88 0.94 89 1.6 90 4.2 91 3.7 92 2.0 93 2.6 93 33.7 95 3.9 96 2.3 TABLE 1 (cont'd) Teεt compound IC.., of aminoguanidine/IC*-,., of teεt compound 97 4.2 98 1.1 99 1.5 100 4.3 101 1.7 102 1.7 103 1.0 104 0.7 105 3.2 106 2.8 107 3.1 108 4.5 109 5.8 110 5.6 111 8.8 112 6.4 113 8.5 114 5.4 115 12.0 116 7.3 117 7.0 118 6.1 119 10.5 120 5.3 PREPARATION EXAMPLE 1 The following ingredients were mixed and tabletted in a conventional manner to thereby give 100 tablets each containing 50 mg of the active ingredient: 5-(4-Benzyloxybenzyl)-2-isopropylidene- hydrazonoimidazolidin-4-one 5 g Sodium lauryl εulfate 0.2 g Magnesium stearate 0.2 g Crystalline cellulose 4.6 g. PREPARATION EXAMPLE 2 5-[4-(4-Chlorobenzyloxy)benzyl]-2- iεopropylidenehydrazonoimidazolidin-4-one 5 g Polyethylene glycol (molecular weight: 4,000) 0.3 g Sodium chloride 0.9 g Polyoxyethylene sorbitan monooleate 0.4 g Sodium metabisulfite 0.1 g Methyl-paraben 0.18 g Propyl-paraben 0.02 g Distilled water for injection 10.0 ml The above parabens, sodium metabisulfite and sodium chloride were diεsolved in about a half amount of the diεtilled water at 80°C under stirring. The solution thus obtained was cooled to 40°C. Then the active compound of the present invention, polyethylene glycol and polyoxyethylene sorbitan monooleate were successively added to the solution and disεolved therein. Next, the diεtilled water for injection was added to the obtained solution so as to adjust to the final volume. After sterilizing by filtering through a suitable filter paper, an injection was obtained.

Claims: CLAIMS 1. A compound represented by the general formula: wherein: R 1 represents a hydrogen atom, a lower alkoxycarbonyl-lower alkyl group, a phenyl-lower alkyl group which may have from 1 to 3 subεtituents εelected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group on the phenyl ring thereof, or a phenyl group which may have 1 to 3 εubεtituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group; R 2 represents an amino group, a phenylsulfonylamino group which may have a εubstituent εelected from a halogen atom, a hydroxyl group, an amino group and a lower alkanoylamino group on the phenyl ring thereof, or —N=R (wherein R repreεentε a lower alkylidene group, a lower alkylidene group having 1 or 2 lower cycloalkyl groups, a lower cycloalkylidene group, a diphenyl-lower alkylidene group or a phenyl-lower alkylidene group); R 3 represents: a hydrogen atom, a lower alkyl group, a lower alkenyl group, a phenyl-lower alkoxy-lower alkyl group, a phenyl group which may have a hydroxyl group, a 5-membered or 6-membered unsaturated heterocyclic-lower alkyl group having 1 or 2 hetero atoms selected from a nitrogen atom and a sulfur atom (wherein said heterocyclic ring may be condensed with a benzene ring and a hydroxyl group may be located as a substituent on either one or both of said heterocyclic ring and the benzene ring being condensed therewith) , — —(NH) b —CO—OR 5 (wherein represents a lower alkylene group, R 3 represents a hydrogen atom, a lower alkyl group, or a phenyl lower alkyl group, .and b is 0 or 1 ) , —Z—CO—R a {wherein Z representε a lower alkylene group, R a representε —Tyr(OR al )-OR bl , -Leu-OR° 2 , -Trp-OR b3 , -Ph-Gly-OR b5 (wherein R al and R a2 each repreεentε a hydrogen atom or a benzyl group, and R bl , R b2 , R b3 , R b and R b5 each repreεents a hydrogen atom or a lower alkyl group) or — (R 6 )—R 7 (wherein R 6 represents a lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl- lower alkyl group, a phenyl-lower alkyl group, a lower cycloalkyl group, a phenyl group which may have 1 to 3 εubεtituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a lower alkoxycarbonyl group, a phenyl-lower alkoxy group, a lower alkylenedioxy group, a morpholino group, a halogenated lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl-lower alkyl group, a 6-hydroxy- 2,5,7,8-tetramethyl-2-chromanylmethyloxy group and a 6-lower alkanoyloxy-2,5,7,8-tetramethyl-2- chromanylmethyloxy group, a naphthyl group, a 3,4- dihydroxycarboεtyryl group, a morpholino group, or a 5-membered or 6-membered unεaturated heterocyclic- lower alkyl group having 1 or 2 hetero atomε εelected from a nitrogen atom, an oxygen atom and a εulfur atom, and R 7 repreεents a hydrogen atom or a lower alkyl group)}, or a group: -(wherein B representε a lower alkylene group, R 8 represents a hydroxyl group, a nitro group, an amino group, a halogen atom, a lower alkyl group, a lower alkoxy group, a phenoxy group, a phenyl-lower alkyl group, a lower alkylthio group, a phenylthio group which may have a halogen atom, a phenyl-lower alkylthio group, a benzoylamino group which may have 1 to 3 halogen atomε, or -O-D-R 9 (wherein D represents a lower alkylene group, R 9 represents a phenyl group which may have 1 to 3 subεtituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group on the phenyl ring thereof (εaid phenyl ring may be condenεed with a benzene ring or a cyclohexane ring), a 5-membered or 6-membered, εaturated or unεaturated heterocyclic group having a hetero atom εelected from a nitrogen atom, a εulfur atom and an oxygen atom (said heterocyclic ring may be condensed with a benzene ring and 1 to 5, in total, subεtituents selected from a hydroxyl group and a lower alkyl group may be located on either one or both of said heterocyclic ring or the benzene ring being condensed with said heterocyclic ring), a lower cycloalkyl group or a naphthoquinone group), and n iε an integer of from 1 to 3 >' ' X represents —S— or —N(R 10 )— (wherein R 10 representε a hydrogen atom, or a lower alkoxycarbonyl-lower alkyl group); " XXZ represents a single bond or a double bond; A, when I Z is a single bond, representε a carbonyl group, or A, when ~ ZZ is a double bond, represents =C(R 11 )— {wherein R 11 represents a lower alkyl group which may have 1 to 3 halogen atoms, a carboxy-lower alkyl group, a pyridyl group, a thiazolyl group, a phenylcarbamoyl-lower alkyl group which may have 1 or 2 lower alkoxy groups on the phenyl ring thereof, or a group: (wherein R 12 representε a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a phenylthio group, or a phenyl-lower alkoxy group which may have 1 to 3 halogen atoms on the phenyl ring thereof, and m is an integer of from 1 to 3) } ; and the above R and R 10 may bind to each other to form a 6- to 8-membered ring, provided that A represents a carbonyl group and R 3 does not represent a hydrogen atom in thiε case; with the provisoε: that, when R 3 representε a hydrogen atom and A represents a carbonyl group, R 1 does not represent a hydrogen atom or a lower alkoxycarbonyl-lower alkyl group; that, when R 3 represents a lower alkyl group, a lower alkenyl group, or — —CO—OR 5 , X does not represent —S—; and that when R u represents a group: R 2 does not represent an amino group; or a pharmaceutically acceptable salt thereof. 2. The compound or the pharmaceutically acceptable salt thereof as claimed in claim 1, wherein: X represents —S—; c R 2 represents an amino group or —N=R*; R 3 representε: a hydrogen atom, a phenyl-lower alkoxy-lower alkyl group, a phenyl group which may have a hydroxyl group, 0 — -(NH) b —CO—OR 5 (wherein repreεentε a lower alkylene group, R 5 repreεents a hydrogen atom, a lower alkyl group, or a phenyl-lower alkyl group, and b is 1) , —Z—CO—R a {wherein Z represents a lower alkylene 5 group, R a representε -Tyr(OR al )-OR I , -Leu-OR b2 , -Trp-OR b3 , -Asp(OR a2 )-OR M , -Ph-Gly-OR b5 (wherein R al and R a2 each represents a hydrogen atom or a benzyl group, and R bl , R b2 , R b3 , R bA and R b5 each represents a hydrogen atom or a lower alkyl group) or —N(R 6 )—R 7 0 (wherein R 6 represents a lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl- lower alkyl group, a phenyl-lower alkyl group, a lower cycloalkyl group, a phenyl group which may have 1 to 3 subεtituentε selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a lower alkoxycarbonyl group, a phenyl-lower alkoxy group, a lower alkylenedioxy group, a morpholino group, a halogenated lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl-lower alkyl group, a 6-hydroxy- 2,5,7 , 8-tetramethyl-2-chromanylmethyloxy group and 6- lower alkanoyloxy-2,5,7, 8-tetramethyl-2- chromanylmethyloxy group, a naphthyl group, a 3,4- dihydroxycarboεtyryl group, a morpholino group, or a 10 5-membered or 6-membered unεaturated heterocyclic- lower alkyl group having 1 or 2 hetero atoms selected from a nitrogen atom, an oxygen atom and a εulfur atom, and R 7 represents a hydrogen atom or a lower alkyl group)}, ,,- or a group: wherein B represents a lower alkylene group, R 8 representε a hydroxyl group, a nitro group, an amino 20 group, a halogen atom, a lower alkyl group, a lower alkoxy group, a phenoxy group, a phenyl-lower alkyl group, a lower alkylthio group, a phenylthio group which may have a halogen atom, a phenyl-lower alkylthio group, a benzoylamino group which may have 25 1 to 3 halogen atoms, or —0—D—R 9 (wherein D represents a lower alkylene group, and R 9 represents a phenyl group which may have 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group on the phenyl ring thereof (said phenyl ring may be condensed with a benzene ring or a cyclohexane ring), a 5-membered or 6-membered, saturated or unsaturated heterocyclic group having a hetero atom εelected from a nitrogen atom, a εulfur atom and an oxygen atom (said heterocyclic ring may be condensed with a benzene ring and 1 to 5, in total, substituents selected from a hydroxyl group and a lower alkyl group may be located on either one or both of said heterocyclic ring or the benzene ring being condensed with said heterocyclic ring), a lower cycloalkyl group or a naphthoquinone group), and n is an integer of from 1 to 3} ; and R u represents a lower alkyl group which may have 1 to 3 halogen atoms, a pyridyl group, a thiazolyl group, a phenylcarbamoyl-lower alkyl group which may have 1 or 2 lower alkoxy groups on the phenyl ring thereof, or a group: (wherein R 12 represents a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a phenylthio group, or a phenyl-lower alkoxy group which may have 1 to 3 halogen atoms on the phenyl ring thereof, and m is an integer of from 1 to 3). c 3. The compound or the pharmaceutically acceptable salt thereof as claimed in claim 2, wherein _____: represents a single bond; A representε a carbonyl group; and R 1 repreεents a hydrogen atom, a lower alkoxycarbonyl-lower alkyl group or a phenyl group which may have 1 to 3 subεtituentε εelected 0 from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group. 4. The compound or the pharmaceutically acceptable εalt thereof as claimed in claim 3, wherein R 1 represents a ir hydrogen atom; and R 2 represents —N=R*. 5. The compound or the pharmaceutically acceptable salt thereof as claimed in claim 4 , wherein R- represents a lower alkylidene group. 6. The compound or the pharmaceutically acceptable 20 salt thereof as claimed in claim 4, wherein R 3 representε -Z-CO-R 3 . 7. The compound or the pharmaceutically acceptable εalt thereof aε claimed in claim 4 , wherein R 3 represents a hydrogen atom, a phenyl-lower alkoxy-lower alkyl group, a 25 phenyl group which may have a hydroxyl group, — —(NH) b —CO—OR 5 or a group: 8. The compound or the pharmaceutically acceptable salt thereof as claimed in claim 6, wherein R a represents -Tyr(OR al )-OR bl , -Leu-OR b2 , -Trp-OR b3 , -Asp(OR a2 )-OR b or —Ph—Gly—0R b5 (wherein R al and R a2 each represents a hydrogen atom or a benzyl group, and R bl , R b2 , R b3 , R b ' 1 and R b5 each repreεentε a hydrogen atom or a lower alkyl group); and R* repreεentε a lower alkylidene group. 9. The compound or the pharmaceutically acceptable salt thereof aε claimed in claim 6 , wherein R a repreεents —N(R 6 )—R 7 (wherein R 6 repreεentε a lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl-lower alkyl group, a phenyl-lower alkyl group, a lower cycloalkyl group, a phenyl group which may have 1 to 3 εubstituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a lower alkoxycarbonyl group, a phenyl-lower alkoxy group, a lower alkylenedioxy group, a morpholino group, a halogenated lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl-lower alkyl group, a 6-hydroxy- 2,5,7,8-tetramethyl-2-chromanylmethyloxy group and a 6-lower alkanoyloxy-2,5,7, 8-tetramethyl-2-chromanylmethyloxy group, a naphthyl group, a 3,4-dihydroxycarbostyryl group, a morpholino group, or a 5-membered or 6-membered unεaturated heterocyclic-lower alkyl group having 1 or 2 hetero atomε selected from a nitrogen atom, an oxygen atom and a sulfur atom, and R 7 represents a hydrogen atom or a lower alkyl group); and R representε a lower alkylidene group. 10. The compound or the pharmaceutically acceptable εalt thereof aε claimed in claim 9, wherein R 6 repreεentε a phenyl group which may have 1 to 3 substituentε εelected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a lower alkoxycarbonyl group, a phenyl-lower alkoxy group, a lower alkylenedioxy group, a morpholino group, a halogenated lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl-lower alkyl group, a 6-hydroxy- 2,5,7 ,8-tetramethyl-2-chromanylmethyloxy group and a 6-lower alkanoyloxy-2,5,7,8-tetramethyl-2-chromanylmethyloxy group; and R 7 repreεentε a hydrogen atom. 11. The compound or the pharmaceutically acceptable salt thereof as claimed in claim 9, wherein R 6 represents a lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl lower alkyl group, a phenyl-lower alkyl group, a lower cycloalkyl group, a naphthyl group, a 3,4- dihydroxycarboεtyryl group, a morpholino group, or a 5- membered or 6-membered unεaturated heterocyclic-lower alkyl group having 1 or 2 hetero atoms selected from a nitrogen atom, an oxygen atom and a sulfur atom. 12. The compound or the pharmaceutically acceptable salt thereof as claimed in claim 10, wherein R 6 repreεents a phenyl group which may have 1 to 3 εubεtituents εelected from a halogen atom, a lower alkyl group and a carboxyl group. _ 13. The compound or the pharmaceutically acceptable » salt thereof as claimed in claim 2, wherein ZTT repreεents a double bond; A represents =C(R U ); R 1 representε a hydrogen atom; R 2 repreεentε —N=R < ; and R 3 repreεentε a hydrogen atom. 14. The compound or the pharmaceutically acceptable εalt thereof aε claimed in claim 13, wherein R 4 repreεentε a lower alkylidene group. 10 15. The compound or the pharmaceutically acceptable εalt thereof as claimed in claim 1, wherein X representε —N(R 10 )—; TTT repreεentε a εingle bond; and A repreεents a carbonyl group. 16. The compound or the pharmaceutically acceptable 15 salt thereof aε claimed in claim 15, wherein R 1 representε a hydrogen atom; R 2 repreεents -N=R l ; R 10 representε a hydrogen atom; and R 3 represents -Z-CO-R a or a group: 20 17. The compound or the pharmaceutically acceptable salt thereof aε claimed in claim 15, wherein R 1 repreεentε a hydrogen atom; R 2 repreεentε —N=R ; R 10 repreεents a hydrogen atom; and R 3 representε a hydrogen atom, a lower alkyl group, a lower alkenyl group, a phenyl-lower alkoxy-lower alkyl 25 group, a phenyl group which may have a hydroxyl group, a 5- membered or 6-membered unsaturated heterocyclic-lower alkyl group (said heterocyclic ring may be condensed with a benzene ring and a hydroxyl group may be located aε a εubstituent on either one or both of said heterocyclic ring and the benzene ring being condensed therewith), or — —(NH) b —CO—OR 5 . 18. The compound or the pharmaceutically acceptable salt thereof as claimed in Claim 1, wherein TTT representε a single bond; A representε a carbonyl group; R 1 represents a hydrogen atom; R 2 represents —N=R 4 ; and R 10 represents a hydrogen atom. 19. The compound or the pharmaceutically acceptable salt thereof as claimed in claim 18, wherein R 3 represents —Z—CO—R a or a group: and R 4 representε a lower alkylidene group. 20. The compound or the pharmaceutically acceptable εalt thereof aε claimed in claim 18, wherein R 3 repreεents a hydrogen atom, a lower alkyl group, a lower alkenyl group, a phenyl-lower alkoxy-lower alkyl group, a phenyl group which may have a hydroxyl group, a 5-membered or 6-membered unsaturated heterocyclic-lower alkyl group (said heterocyclic ring may be condensed with a benzene ring and a hydroxyl group may be located as a substituent on either one or both of said heterocyclic ring and the benzene ring being condensed therewith) or -W-(NH) b -CO-OR 5 . 21. The compound or the pharmaceutically acceptable εalt thereof as claimed in claim 1 , wherein TTT representε a single bond; A representε a carbonyl group; and R 3 repreεents -Z-CO-R 3 . 22. A compound selected from the group consiεting of: 2-iεopropylidenehydrazono-5-(N-phenylcarbamoyl- methyl)thiazolidin-4-one, 5-[N-(2-carboxy-4-methylphenyl)carbamoylmethyl]-2- 10 iεopropylidenehydrazonothiazolidin-4-one, 5-[N-(3,4-difluorophenyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one, 5-[ -( 2-carboxy-4-chlorophenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one, 15 5-[N-(2,6-dimethylphenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one, 5-[ -(4-fluorophenyl )carbamoylmethyl]-2- iεopropylidene-hydrazonothiazolidin-4-one, and pharmaceutically acceptable saltε thereof. 20 23. A compound selected from the group consiεting of: 2-isopropylidenehydrazono-5-(N-phenylcarbamoyl- methyl)thiazolidin-4-one, 5-[N-(2-carboxy-4-methylphenyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one, > 2 and pharmaceutically acceptable εalts thereof. 24. A compound selected from the group consisting of : 2-isopropylidenehydrazono-5-(N-phenylcarbamoyl- methyl)thiazolidin-4-one, 5-[N-(2-carboxy-4-methylphenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one, 2-isopropylidenehydrazono-5-[4-(3-pyridylmethoxy)- benzyl]thiazolidin-4-one, 5-[N-(3,4-difluorophenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one, 10 5-[N-(4-chlorophenyl )carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one, 2-isopropylidenehydrazono-5-[N-(4-methoxyphenyl)- carbamoylmethyl]thiazolidin-4-one, 2-isopropylidenehydrazono-5-(N-methyl-N-phenyl- . - carbamoylmethyl)thiazolidin-4-one, 2-isopropylidenehydrazono-5-[N-(4-morpholinophenyl)- carbamoylmethyl]thiazolidin-4-one, 2-isopropylidenehydrazono-5-[N-( 1-phenylethyl )- carbamoylmethyl]thiazolidin-4-one, ?n 2-isopropylidenehydrazono-5-[N-( 2-methyl-5-methoxy- carbonylphenyl )carbamoylmethyl]thiazolidin-4-one, and pharmaceutically acceptable salts thereof. 25. A compound selected from the group consisting of: 5-[4-(2, 6-dichlorobenzyloxy)benzyl]-2-isopropylidene- „ c hydrazonoimidazolidin-4-one, 5-[4-(4-chlorobenzyloxy)benzyl]-2-iεopropylidene- hydrazonoimidazolidin-4-one, 2-isopropylidenehydrazono-5-(4-phenylthio-benzyl)- imidazolidin-4-one, 5-(3,4-dihydroxybenzyl)-2-isopropylidenehydrazono- imidazolidin-4-one, 5-(4-benzyloxycarbonylaminobutyl)-2-iεopropylidene- hydrazonoimidazolidin-4-one, 2-iεopropylidenehydrazono-5-(4-methoxycarbonyl- aminobutyl)imidazolidin-4-one, 10 5-benzyloxycarbonylmethyl-2-iεopropylidenehydrazono- imidazolidin-4-one, 2-iεopropylidenehydrazono-5-methoxycarbonylmethyl- imidazolidin-4-one, . _ 2-isopropylidenehydrazono-5-(N-phenylcarbamoyl- methyl)imidazolidin-4-one, and pharmaceutically acceptable εaltε thereof . 26. A compound εelected from the group conεiεting of: 5-[4-(2,6-dichlorobenzyloxy)benzyl]-2-isopropylidene- „ fi hydrazonoimidazolidin-4-one, 5-[4-(4-chlorobenzyloxy)benzyl]-2-isopropylidene- hydrazonoimidazolidin-4-one, 2-isopropylidenehydrazino-4-(4-phenyl-thiophenyl )- thiazole, ,. - 5-[N-( 2-carboxy-4-methylphenyl)carbamoylmethyl]-2- iεopropylidenehydrazonothiazolidin-4-one, 2-isopropylidenehydrazono-5-[4-(3-pyridylmethoxy)- benzyl]thiazolidin-4-one, 5-(3,4-dihydroxybenzyl)-2-isopropylidenehydrazono- imidazolidin-4-one, 5-[N-(3,4-difluorophenyl)carbamoylmethyl]-2- isopropylidenehydrazonothiazolidin-4-one, 2-isopropylidenehydrazono-5-[ -(4-methoxyphenyl )- carbamoylmethyl]thiazolidin-4-one, 2-isopropylidenehydrazono-5-[N-(2-methyl-5-methoxy¬ 0 carbonylphenyl)carbamoylmethyl]thiazolidin-4-one, 4-[N-(3,4-dimethoxyphenyl)carbamoylmethyl]-2- iεopropylidenehydrazinothiazole, and pharmaceutically acceptable εalts thereof . 27. A method for treating diseases caused by a c Meillard reaction in living body which comprises administrating at least one compound selected from those represented by the general formula: wherein: R 1 represents a hydrogen atom, a lower alkoxycarbonyl-lower alkyl group, a phenyl-lower alkyl group 5 which may have from 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group on the phenyl ring thereof, or a phenyl group which may have 1 to 3 subεtituentε εelected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group; R 2 repreεentε an amino group, a phenylεulfonylamino group which may have a εubstituent selected from a halogen atom, a hydroxyl group, an amino group and a lower alkanoylamino group on the phenyl ring thereof, or —N=R 4 (wherein R representε a lower alkylidene group, a lower alkylidene group having 1 or 2 lower cycloalkyl groupε, a lower cycloalkylidene group, a diphenyl-lower alkylidene group or a phenyl-lower alkylidene group); R 3 repreεentε: a hydrogen atom, a lower alkyl group, a lower alkenyl group, a phenyl-lower alkoxy-lower alkyl group, a phenyl group which may have a hydroxyl group, a 5-membered or 6-membered unεaturated heterocyclic-lower alkyl group having 1 or 2 hetero atomε selected from a nitrogen atom and a sulfur atom (said heterocyclic ring may be condensed with a benzene ring and a hydroxyl group may be located as a subεtituent on either one or both of said heterocyclic ring and said benzene ring being condensed therewith), - -(NH) b -CO-OR 5 (wherein W representε a lower alkylene group, R 5 represents a hydrogen atom, a lower alkyl group, or a phenyl-lower alkyl group, and b is 0 or 1 ) , —Z—CO—R a {wherein Z representε a lower alkylene group, R a repreεentε -Tyr(0R al )-0R bi , -Leu-OR b2 , -Trp-OR b3 , -Aεp(OR a2 )-OR b \ -Ph-Gly-OR b5 (wherein R al and R a2 each represents a hydrogen atom or a benzyl group, and R bl , R b2 , R b3 , R b * and R b5 each represents a hydrogen atom or a lower alkyl group) or —N(R 6 )—R 7 (wherein R 6 repreεentε a lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl- lower alkyl group, a phenyl-lower alkyl group, a lower cycloalkyl group, a phenyl group which may have 1 to 3 εubstituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a lower alkoxycarbonyl group, a phenyl-lower alkoxy group, a lower alkylenedioxy group, a morpholino group, a halogenated lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl-lower alkyl group, a 6-hydroxy- 2,5,7 , 8-tetramethyl-2-chromanylmethyloxy group and a 6-lower alkanoyloxy-2,5,7, 8-tetramethyl-2- chromanylmethyloxy group, a naphthyl group, a 3,4- dihydroxycarboεtyryl group, a morpholino group, or a 5-membered or 6-membered unεaturated heterocyclic- lower alkyl group having 1 or 2 hetero atomε selected from a nitrogen atom, an oxygen atom and a sulfur atom, and R 7 represents a hydrogen atom or a lower alkyl group) } , or a group: {wherein B representε a lower alkylene group, R 8 repreεentε a hydroxyl group, a nitro group, an amino group, a halogen atom, a lower alkyl group, a lower alkoxy group, a phenoxy group, a phenyl-lower alkyl group, a lower alkylthio group, a phenylthio group which may have a halogen atom, a phenyl-lower alkylthio group, a benzoylamino group which may have 1 to 3 halogen atoms, or —0—D—R 9 (wherein D represents a lower alkylene group, R 9 representε a phenyl group which may have 1 to 3 εubεtituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group on the phenyl ring thereof (said phenyl ring may be condensed with a benzene ring or a cyclohexane ring), a 5-membered or 6-membered, saturated or unsaturated heterocyclic group having a hetero atom selected from a nitrogen atom, a sulfur atom and an oxygen atom (said heterocyclic ring may be condensed with a benzene ring and 1 to 5, in total, substituents selected from a hydroxyl group and a lower alkyl group may be located on either one of both of said heterocyclic ring or the benzene ring being condensed with said heterocyclic ring), a lower cycloalkyl group or a naphthoquinone group), and n is an integer of from 1 to 3}; X represents —S— or —N(R 10 )— (wherein R 10 representε a hydrogen atom or a lower alkoxycarbonyl-lower alkyl group); repreεents a single bond or a double bond; A, when ____ ~ Z is a single bond, represents a carbonyl group, or A, when ZZZ Z is a double bond, represents =C(R U )- {wherein R 11 represents a lower alkyl group which may have 1 to 3 halogen atoms, a lower alkoxycarbonyl-lower alkyl group, a carboxy-lower alkyl group, a pyridyl group, a thienyl group, a thiazolyl group, a phenylcarbamoyl-lower alkyl group which may have 1 or 2 lower alkoxy groups on the phenyl ring thereof, or a group: (wherein R 12 repreεentε a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a phenylthio group, or a phenyl-lower alkoxy group which may have 1 to 3 halogen atomε on the phenyl ring thereof, and m iε an integer of from 1 to 3) } ; and the above R* and R 10 may bind to each other to form a 6- to 8-membered ring (with the proviso that A represents a carbonyl group in this case), and R 3 and R 11 may bind to each other to form a 5- to 8-membered ring, with the proviso that, when R 3 represents a hydrogen atom and A representε a carbonyl group, R 1 does not represent a hydrogen atom or a lower alkoxycarbonyl-lower alkyl group; or a pharmaceutically acceptable salt thereof . 28. The method as claimed in claim 27, wherein said disease caused by a Meillard reaction in living body is diabetic complications, atherosclerosiε or εenile cataract. 29. The method aε claimed in claim 27, wherein ZTT repreεentε a single bond; A representε a carbonyl group; and R 1 repreεentε a hydrogen atom, a lower alkoxycarbonyl-lower alkyl group or a phenyl group which may have 1 to 3 εubεtituentε εelected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group. 30. A method for treating diεeaseε caused by a Meillard reaction in living body which comprises administrating a compound selected from those represented by the general formula: R" X N - R ' Y 2 N - R Z wherein : R 1 representε a hydrogen atom, a lower alkoxycarbonyl-lower alkyl group, a phenyl-lower alkyl group which may have from 1 to 3 εubstituentε selected from a halogen atom, a lower alkyl group and a lower alkoxy group on the phenyl ring thereof, or a phenyl group which may have 1 to 3 substituents selected from a halogen atom, a lower alkyl group and a lower alkoxy group; R 2 representε —N=R 4 (wherein R 4 repreεents a lower alkylidene group, a diphenylmethylene group or a phenyl-lower alkylidene group); R 3 representε a hydrogen atom, a lower alkyl group, —CH 2 —CO—OR 5 (wherein R 5 repreεentε a hydrogen atom or a lower alkyl group), a phenyl group which may have a hydroxyl group, a 5-membered or 6-membered unsaturated heterocyclic-lower alkyl group having a hetero atom selected from a nitrogen atom and a sulfur atom, —CH 2 -CO—NHR 6 (wherein R 6 representε a lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl-lower alkyl group, a phenyl-lower alkyl group, a lower cycloalkyl group, a phenyl group which may have 1 or 2 εubεtituentε εelected from a carboxyl group and a lower alkoxycarbonyl group, or a 3,4-dihydrocarbostyryl group), a phenyl-lower alkoxy-lower alkyl group or a group: {wherein B represents a lower alkylene group, R 8 represents a hydroxyl group, a nitro group, an amino group, a halogen atom, a lower alkyl group, a lower alkoxy group, a phenoxy group, a phenyl-lower alkyl group, a lower alkylthio group, a phenylthio group, a phenyl-lower alkylthio group, a benzoylamino group which may have 1 to 3 halogen atoms, a phenyl-lower alkoxy group which may have 1 to 3 εubεtituents selected from a halogen atom, a lower alkyl group and a lower alkoxy group on the phenyl ring thereof (the phenyl ring of said phenyl-lower alkoxy group may be condensed with a benzene ring or a cyclohexane ring), a 5-membered or 6-membered, saturated or unsaturated heterocyclic-lower alkoxy group having a hetero atom selected from a nitrogen atom, a sulfur atom and an oxygen atom (said heterocyclic ring may be condensed with a benzene ring and 1 to 5 subεtituents selected from a hydroxyl group and a lower alkyl group may be located on said heterocyclic ring and the benzene ring being condenεed with the heterocyclic ring), or —0—D—R 9 (wherein D repreεentε a lower alkylene group, R 9 repreεentε a lower cycloalkyl group or a naphthoquinone group), and n iε an integer of from 1 to 3}; X represents —S— or -N(R 10 )— (wherein R 10 represents a hydrogen atom or a lower alkoxycarbonyl-lower alkyl group); TTT representε a εingle bond or a double bond; A, when ZZT iε a single bond, representε a carbonyl group, or A, when TZT iε a double bond, repreεents «•■■■€(R 11 )— {wherein R 11 representε a lower alkyl group or a group: (wherein R 12 represents a halogen atom, a lower alkyl group, a lower alkoxy group, a hydroxyl group, a phenylthio group or a phenyl-lower alkoxy group which may have 1 to 3 halogen atoms on the phenyl ring thereof, and m is an integer of from 1 to 3)}; and the above R 4 and R 10 may bind to each other to form a 6- to 8- membered ring (with the proviso that A representε a carbonyl group in this case), and R 3 and R n may bind to each other to form a 5- to 8-membered ring, with the proviso that, when R 3 representε a hydrogen atom and A repreεentε a carbonyl group, R 1 doeε not represents a hydrogen atom or a lower alkoxycarbonyl-lower alkyl group; or a pharmaceutically acceptable salt thereof. 31. A procesε for producing a compound represented by the general formula: wherein: R 1 represents a hydrogen atom, a lower alkoxycarbonyl-lower alkyl group, a phenyl-lower alkyl group which may have from 1 to 3 substituentε selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group on the phenyl ring thereof, or a phenyl group which may have 1 to 3 subεtituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group; R 2 repreεentε an amino group, a phenylsulfonylamino group which may have a substituent selected from a halogen atom, a hydroxyl group, an amino group and a lower alkanoylamino group on the phenyl ring thereof, or —N=R 4 (wherein R 4 represents a lower alkylidene group, a lower alkylidene group having 1 or 2 lower cycloalkyl groups, a lower cycloalkylidene group, a diphenyl-lower alkylidene group or a phenyl-lower alkylidene group); R 3 represents: a hydrogen atom, a lower alkyl group, a lower alkenyl group, a phenyl-lower alkoxy-lower alkyl group, a phenyl group which may have a hydroxyl group, a 5-membered or 6-membered unsaturated heterocyclic-lower alkyl group having 1 or 2 hetero atoms selected from a nitrogen atom and a sulfur atom (wherein said heterocyclic ring may be condensed with a benzene ring and a hydroxyl group may be located as a substituent on either one or both of said heterocyclic ring and the benzene ring being condenεed therewith), —W—(NH) b —CO—OR 5 (wherein W repreεents a lower alkylene group, R 5 represents a hydrogen atom, a lower alkyl group, or a phenyl lower alkyl group, and b is 0 or 1 ) , —Z—CO—R a {wherein Z representε a lower alkylene group, R a represents -Ty (OR al )-OR bl , -Leu-OR b2 , -Trp-OR b3 , -Asp(OR a2 )-OR b \ -Ph-Gly-OR b5 (wherein R al and R a2 each repreεents a hydrogen atom or a benzyl group, and R bl , R b2 , R° 3 , R b4 and R b5 each represents a hydrogen atom or a lower alkyl group) or —N(R 6 )—R 7 (wherein R 6 represents a lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl- lower alkyl group, a phenyl-lower alkyl group, a lower cycloalkyl group, a phenyl group which may have 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a lower alkoxycarbonyl group, a phenyl-lower alkoxy group, a lower alkylenedioxy group, a morpholino group, a halogenated lower alkyl group, a carboxy-lower alkyl group, a lower alkoxycarbonyl-lower alkyl group, a 6-hydroxy- 2,5,7,8-tetramethyl-2-chromanylmethyloxy group and a 6-lower alkanoyloxy-2,5,7,8-tetramethyl-2- chromanylmethyloxy group, a naphthyl group, a 3,4- dihydroxycarboεtyryl group, a morpholino group, or a 5-membered or 6-membered unεaturated heterocyclic- lower alkyl group having 1 or 2 hetero atomε εelected from a nitrogen atom, an oxygen atom and a εulfur atom, and R 7 repreεentε a hydrogen atom or a lower alkyl group)}, or a group: {wherein B represents a lower alkylene group, R 8 represents a hydroxyl group, a nitro group, an amino group, a halogen atom, a lower alkyl group, a lower alkoxy group, a phenoxy group, a phenyl-lower alkyl group, a lower alkylthio group, a phenylthio group which may have a halogen atom, a phenyl-lower alkylthio group, a benzoylamino group which may have 1 to 3 halogen atoms, or -O-D-R 9 (wherein D represents a lower alkylene group, R 9 representε a phenyl group which may have 1 to 3 substituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group on the phenyl ring thereof (said phenyl ring may be condensed with a benzene ring or a cyclohexane ring), a 5-membered or 6-membered, saturated or unsaturated heterocyclic group having a hetero atom selected from a nitrogen atom, a sulfur atom and an oxygen atom (said heterocyclic ring may be condensed with a benzene ring and 1 to 5, in total, εubεtituents selected from a hydroxyl group and a lower alkyl group may be located on either one or both of said heterocyclic ring or the benzene ring being condensed with said heterocyclic ring), a lower cycloalkyl group or a naphthoquinone group) , and n is an integer of from 1 to 3}; X repreεents —S— or —N(R 10 )— (wherein R 10 represents a hydrogen atom, or a lower alkoxycarbonyl-lower alkyl group); TTT represents a single bond or a double bond; A, when Z is a single bond, represents a carbonyl group, or A, when TTT is a double bond, representε =C(R n )— {wherein R 11 represents a lower alkyl group which may have 1 to 3 halogen atoms, a carboxy-lower alkyl group, a pyridyl group, a thiazolyl group, a phenylcarbamoyl-lower alkyl group which may have 1 or 2 lower alkoxy groups on the phenyl ring thereof, or a group: (wherein R 12 repreεentε a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group, a lower alkylthio group, a carboxyl group, a phenylthio group, or a phenyl-lower alkoxy group which may have 1 to 3 halogen atomε on the phenyl ring thereof, and m iε an integer of from 1 to 3)}; and the above R 4 and R 10 may bind to each other to form a 6- to 8-membered ring, provided that A represents a carbonyl group and R 3 does not represent a hydrogen atom in this case; with the provisoε: that, when R 3 repreεents a hydrogen atom and A representε a carbonyl group, R 1 doeε not represent a hydrogen atom or a lower alkoxycarbonyl-lower alkyl group; that, when R 3 representε a lower alkyl group, a lower alkenyl group, or — —CO—OR 5 , X doeε not repreεent —S—; and that when R u represents a group: R 2 doeε not repreεent an amino group, which compriεeε: (i) reacting a compound represented by the following general formula (2) or an acid addition salt thereof with a compound repreεented by the following general formula (3) or an acid addition salt thereof: H, NC-NHR L II (2) NH R' R 10 -NH-CK-COOR 13 (3) wherein, R 1 , R 2 , R 3 and R 10 have the same meaning as described above, and R 13 represents an ester residue; (ϋ) reacting a compound represented by the following general formula (4) with a compound represented by the following general formula (5): R 1 NH-C-NHR 2 II (4) S R 3 (5) Y-CH-COOR' wherein R 1 , R 2 and R 3 have the same meaning as described above, R 14 representε a usual ester residue, and Y represents a halogen atom or a lower alkanesulfonyl group; (iii) reacting a compound represented by the following general formula (6) with a compound represented by the following general formula (lc): R a H (6) wherein R 1 , R 2 and R a have the same meaning as described above, R 15 represents —Z—COOH, and R 16 represents —Z—CO—R a wherein Z has the εame meaning aε deεcribed above; (iv) reacting a compound represented by the following general formula (le) with a compound represented by the following general formula (7): Y N-R 2 R 18 -Y ( 7 ) wherein R 2 and R 15 have the same meaning as described above, and R 18 represents a lower alkoxycarbonyl-lower alkyl group or a phenyl- lower alkyl group which may have from 1 to 3 εubstituents selected from a halogen atom, a hydroxyl group, a nitro group, a lower alkyl group, a lower alkoxy group and a lower alkylthio group on the phenyl ring thereof; (v) hydrolyzing a compound presented by the following general formula (lg): wherein R 1 , R 2 and Z have the same meaning as described above, and R 19 represents a group having an ester residue among the ones defined by R a ; (vi) reacting a compound represented by the following general formula (li) with a compound represented the following general formula (8): R 3 HN NH Y (li) 2 N-R' R 21 -Y ( 8 ) wherein R 2 and R 3 have the εame meaning aε deεcribed above, and R 21 repreεentε a lower alkoxycarbonyl-lower alkyl group, a phenyl- lower alkyl group which may have from 1 to 3 εubεtituents selected from a halogen atom, a lower alkyl group and a lower alkoxy group on the phenyl ring thereof, or a phenyl group which may have 1 to 3 subεtituents selected from a halogen atom, a lower alkyl group and a lower alkoxy group; (vii) reacting a compound represented by the following general formula (9) with a compound represented by the following general formula (10): χ < (9) h N-C- -NHR 2 R 1 | 1 (10) 11 Y- -CH- • CO-R" wherein R 2 , R 3 , R 11 and Y have the εame meaning aε described above, and =X' representε =S or =NH; or (viii) reacting a compound repreεented by the following general formula (11) with a compound repreεented by the following general formula (12): R J' -Y (12) wherein R 1 and Y have the εame meaning as described above, R 3 ' haε the εame meaning aε R 3 except for a hydrogen atom, R 22 represents a lower alkoxycarbonyl-lower alkyl group, a phenyl-lower alkyl group which may have from 1 to 3 substituents selected from a halogen atom, a lower alkyl group and a lower alkoxy group on the phenyl ring thereof or a phenyl group which may have from 1 to 3 substituents selected from a halogen atom, a lower alkyl group and a lower alkoxy group, and p iε an integer of from 1 to 3.

Inventors: ISHIKAWA SHINTARO, MIYAJIMA KEISUKE, NAGAHAMA TAKAO, SUGIYAMA KAZUHISA, TOHYAMA YUKO, YASUMURA KOICHI, ISHIKAWA, SHINTARO, MIYAJIMA, KEISUKE, NAGAHAMA, TAKAO, SUGIYAMA, KAZUHISA, TOHYAMA, YUKO, YASUMURA, KOICHI
Applicants: ISHIKAWA SHINTARO, MIYAJIMA KEISUKE, NAGAHAMA TAKAO, OTSUKA PHARMA CO LTD, SUGIYAMA KAZUHISA, TOHYAMA YUKO, YASUMURA KOICHI, ISHIKAWA, SHINTARO, MIYAJIMA, KEISUKE, NAGAHAMA, TAKAO, OTSUKA PHARMACEUTICAL CO., LTD., SUGIYAMA, KAZUHISA, TOHYAMA, YUKO, YASUMURA, KOICHI
Application year: 1994
Main classification: C07D277
IPC codes: C07D233, C07D277, C07D403, C07D409, C07D417, C07D487